==============================================================================
                               UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549
                            -------------------
                                FORM 10-K/A
                              AMENDMENT NO. 1
                               ANNUAL REPORT
                  PURSUANT TO SECTIONS 13 OR 15(D) OF THE
                      SECURITIES EXCHANGE ACT OF 1934

   (MARK ONE)
   |X|    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
          EXCHANGE ACT OF 1934

                FOR THE FISCAL YEAR ENDED SEPTEMBER 30, 2005
                                     OR

   |_|    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
          EXCHANGE ACT OF 1934

          For the transition period from _________ to ___________

                       Commission file number 1-32532

                                ASHLAND INC.

            Kentucky                                  20-0865835
  (State or other jurisdiction           (I.R.S. Employer Identification No.)
      of incorporation or
         organization)

                        50 E. RiverCenter Boulevard
                                P.O. Box 391
                       Covington, Kentucky 41012-0391
                      Telephone Number (859) 815-3333

        Securities Registered Pursuant to Section 12(b) of the Act:

                                                    Name of each exchange
            Title of each class                     on which registered
            -------------------                     -------------------
Common Stock, par value $.01 per share            New York Stock Exchange
                                                     and Chicago Stock Exchange
Rights to purchase Series A Participating         New York Stock Exchange
     Cumulative Preferred Stock                      and Chicago Stock Exchange

      Securities Registered Pursuant to Section 12(g) of the Act: None

     Indicate  by check mark if the  Registrant  is a  well-known  seasoned
issuer, as defined in Rule 405 of the Securities Act. Yes |X| No |_|

     Indicate  by check  mark if the  Registrant  is not  required  to file
reports pursuant to Section 13 or Section 15(d) of the Act. Yes |_| No |X|

     Indicate  by check  mark  whether  the  Registrant  (1) has  filed all
reports  required  to be filed  by  Section  13 or 15(d) of the  Securities
Exchange  Act of 1934 during the  preceding  12 months (or for such shorter
period that the Registrant was required to file such reports),  and (2) has
been subject to such filing  requirements  for the past 90 days. Yes |X| No
|_|

     Indicate by check mark if disclosure of delinquent  filers pursuant to
Item  405 of  Regulation  S-K is not  contained  herein,  and  will  not be
contained,  to the best of Registrant's  knowledge,  in definitive proxy or
information  statements  incorporated by reference in Part III of this Form
10-K or any amendment to this Form 10-K. |_|

     Indicate by check mark whether the Registrant is an accelerated  filer
(as defined in Rule 12b-2 of the Exchange Act). Yes |X| No |_|

     Indicate by check mark whether the  Registrant  is a shell company (as
defined in Rule 12b-2 of the Exchange Act). Yes |_| No |X|

     At March 31, 2005, the aggregate  market value of voting stock held by
non-affiliates  of the  Registrant  was  approximately  $4,905,417,887.  In
determining this amount,  the Registrant has assumed that its directors and
executive  officers are  affiliates.  Such  assumption  shall not be deemed
conclusive for any other purpose.

     At February 28, 2006,  there were  71,118,940  shares of  Registrant's
common stock outstanding.

                    Documents Incorporated by Reference

     Portions  of  Registrant's  definitive  Proxy  Statement  (the  "Proxy
Statement")  for its January 26, 2006 Annual  Meeting of  Shareholders  are
incorporated by reference into Part III.





                              EXPLANATORY NOTE

     This amendment to the Annual Report on Form 10-K/A for the fiscal year
ended  September  30, 2005 of Ashland  Inc.  ("Ashland")  is being filed to
include the audited financial  statements of Marathon Petroleum Company LLC
("MPC"),  formerly  known as  Marathon  Ashland  Petroleum LLC, for the six
months  ended June 30,  2005, as required by Rule 3-09 of  Regulation  S-X.
Ashland  had a 38%  equity  interest  in MPC  through  June  30,  2005.  In
accordance  with Rule 12b-15 under the Securities and Exchange Act of 1934,
as amended,  the text of the amended  item is set forth in its  entirety in
the pages attached hereto.

     A consent of  PricewaterhouseCoopers  LLP, independent accountants for
MPC, is being filed as an exhibit hereto.


                                  PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

     (a) DOCUMENTS FILED AS PART OF THIS REPORT

     (1) and (2) Financial Statements and Financial Schedule

     (3) See Item 15(b) in this annual report on Form 10-K

     The  consolidated  financial  statements  and  financial  schedule  of
Ashland  presented  in this  annual  report on Form 10-K are  listed in the
index on page F-1.

     Audited  financial   statements  of  Marathon  Petroleum  Company  LLC
(formerly Marathon Ashland Petroleum LLC).  Financial  statement  schedules
are omitted because they are not applicable as the required  information is
contained in the applicable financial statements or notes thereto.

     (b) DOCUMENTS REQUIRED BY ITEM 601 OF REGULATION S-K

     3.1        Second  Restated   Articles  of  Incorporation  of  Ashland
                effective July 21, 2005 (filed as Exhibit 3(i) to Ashland's
                Form  10-Q  for  the  quarter  ended  June  30,  2005,  and
                incorporated herein by reference).

     3.2        By-laws of Ashland, effective as of June 30, 2005 (filed as
                Exhibit 3(ii) to Ashland's  Form 10-Q for the quarter ended
                June 30, 2005, and incorporated herein by reference).

     4.1        Ashland agrees to provide the SEC, upon request,  copies of
                instruments  defining  the rights of  holders of  long-term
                debt of  Ashland  and  all of its  subsidiaries  for  which
                consolidated  or  unconsolidated  financial  statements are
                required to be filed with the SEC.

     4.2        Indenture,  dated as of August 15,  1989,  as  amended  and
                restated  as  of  August  15,  1990,  between  Ashland  and
                Citibank,  N.A.,  as  Trustee  (filed  as  Exhibit  4.2  to
                Ashland's  annual  report on Form 10-K for the fiscal  year
                ended  September  30,  2001,  and  incorporated  herein  by
                reference).

     4.3        Rights Agreement, dated as of May 16, 1996, between Ashland
                Inc.  and the  Rights  Agent,  together  with Form of Right
                Certificate  (filed  as  Exhibit  4.4 to  Ashland's  annual
                report on Form 10-K for the fiscal year ended September 30,
                2001, and incorporated herein by reference).

     4.4        Amendment  No. 1 dated  as of March  18,  2004,  to  Rights
                Agreement  dated as of May 16, 1996,  between  Ashland Inc.
                and Rights Agent (filed as Exhibit 4 to Ashland's Form 10-Q
                for the quarter  ended  March 31,  2004,  and  incorporated
                herein by reference).

     4.5        Amendment  No. 2 dated  as of April  27,  2005,  to  Rights
                Agreement  dated as of May 16, 1996,  between  Ashland Inc.
                and Rights Agent  (filed as Exhibit 4.7 to  Ashland's  Form
                S-4/A  on  May  2,  2005,   and   incorporated   herein  by
                reference).

     The   following   Exhibits   10.1  through   10.18  are  contracts  or
compensatory  plans or arrangements or management  contracts required to be
filed   as    exhibits    pursuant   to   Items    601(b)(10)(ii)(A)    and
601(b)(10)(iii)(A) and (B) of Regulation S-K.

     10.1       Ashland Inc.  Deferred  Compensation  Plan for Non-Employee
                Directors (filed as Exhibit 10.5 to Ashland's Form 10-Q for
                the quarter  ended  December  31,  2004,  and  incorporated
                herein by reference).

     10.2       Ashland Inc.  Deferred  Compensation Plan (filed as Exhibit
                10.3 to Ashland's  Form 10-Q for the quarter ended December
                31, 2004, and incorporated herein by reference).

     10.3       Ashland  Inc.  Deferred  Compensation  Plan  for  Employees
                (2005) (filed as Exhibit 10 to Ashland's  Form 10-Q for the
                quarter ended March 31, 2005,  and  incorporated  herein by
                reference).

     10.4       Amendment No. 1 to Ashland Inc. Deferred  Compensation Plan
                for Employees (2005) dated October 28, 2005.

     10.5       Ashland Inc.  Deferred  Compensation  Plan for Non-Employee
                Directors  (2005) (filed as Exhibit 10.6 to Ashland's  Form
                10-Q  for  the  quarter  ended   December  31,  2004,   and
                incorporated herein by reference).



     10.6       Eleventh  Amended and Restated  Ashland  Inc.  Supplemental
                Early  Retirement  Plan for  Certain  Employees  (filed  as
                Exhibit 10.2 to Ashland's  Form 10-Q for the quarter  ended
                December 31, 2004, and incorporated herein by reference).

     10.7       Amendment  No. 1 to Eleventh  Amended and Restated  Ashland
                Inc.   Supplemental   Early  Retirement  Plan  for  Certain
                Employees dated December 20, 2004.

     10.8       Ashland  Inc.  Salary  Continuation  Plan (filed as Exhibit
                10.5 to Ashland's annual report on Form 10-K for the fiscal
                year ended September 30, 2002, and  incorporated  herein by
                reference).

     10.9       Form of Ashland Inc. Executive  Employment Contract between
                Ashland Inc. and certain  executives  of Ashland  (filed as
                Exhibit  10.6 to Ashland's  annual  report on Form 10-K for
                the fiscal year ended September 30, 2002, and  incorporated
                herein by reference).

     10.10      Form of Indemnification  Agreement between Ashland Inc. and
                members of its Board of Directors.

     10.11      Ashland Inc.  Nonqualified  Excess  Benefit  Pension Plan -
                2003  Restatement  (filed as Exhibit 10.1 to Ashland's Form
                10-Q  for  the  quarter  ended   December  31,  2004,   and
                incorporated herein by reference).

     10.12      Ashland Inc. Directors'  Charitable Award Program (filed as
                Exhibit  10.11 to Ashland's  annual report on Form 10-K for
                the fiscal year ended September 30, 2002, and  incorporated
                herein by reference).

     10.13      Ashland Inc.  1993 Stock  Incentive  Plan (filed as Exhibit
                10.11  to  Ashland's  annual  report  on Form  10-K for the
                fiscal year ended  September  30,  2000,  and  incorporated
                herein by reference).

     10.14      Ashland Inc.  1997 Stock  Incentive  Plan (filed as Exhibit
                10.14  to  Ashland's  annual  report  on Form  10-K for the
                fiscal year ended  September  30,  2002,  and  incorporated
                herein by reference).

     10.15      Amended and Restated Ashland Inc.  Incentive Plan (filed as
                Exhibit 10.1 to Ashland's  Form 10-Q for the quarter  ended
                June 30, 2004, and incorporated herein by reference).

     10.16      Forms of Notice granting Stock Appreciation Rights Awards.

     10.17      Form of Notice granting Restricted Stock Awards.

     10.18      Form of Notice granting Nonqualified Stock Option Awards.

     10.19      Five-Year, $350 Million Revolving Credit Agreement dated as
                of March 21, 2005 (filed as Exhibit 10.1 to Ashland's  Form
                8-K filed on March 24,  2005,  and  incorporated  herein by
                reference).

     10.20*     Master  Agreement dated as of March 18, 2004, and Amendment
                No. 1 dated as of April 27, 2005,  among Ashland Inc.,  ATB
                Holdings  Inc.,  EXM  LLC,  New  EXM  Inc.,   Marathon  Oil
                Corporation,  Marathon Oil Company,  Marathon  Domestic LLC
                and Marathon Ashland Petroleum LLC (filed as Exhibit 2.1 to
                Ashland's  Form  S-4/A  dated and filed May 19,  2005,  and
                incorporated herein by reference).

     10.21*     Amended and Restated Tax Matters  Agreement dated April 27,
                2005,  among Ashland Inc.,  ATB Holdings Inc., EXM LLC, New
                EXM Inc.,  Marathon Oil Corporation,  Marathon Oil Company,
                Marathon  Domestic LLC and Marathon  Ashland  Petroleum LLC
                (filed as Annex B to  Ashland's  Form S-4/A dated and filed
                May 19, 2005, and incorporated herein by reference).

     10.22*     Assignment and Assumption Agreement (VIOC Centers) dated as
                of March 18,  2004,  between  Ashland Inc. and ATB Holdings
                Inc.  (filed as Annex D to  Ashland's  Form S-4/A dated and
                filed May 19, 2005, and incorporated herein by reference).

     10.23*     Assignment and Assumption Agreement (Maleic Business) dated
                as of March 18, 2004, between Ashland Inc. and ATB Holdings
                Inc.  (filed as Annex C to  Ashland's  Form S-4/A dated and
                filed May 19, 2005, and incorporated herein by reference).




     10.24*     Amendment  No. 2 dated as of March 18, 2004,  and Amendment
                No.  3 dated as of  April  27,  2005,  to the  Amended  and
                Restated Limited  Liability  Company  Agreement dated as of
                December 31, 1998, of Marathon  Ashland  Petroleum  LLC, by
                and between Ashland Inc. and Marathon Oil Company (filed as
                Annex E to  Ashland's  Form  S-4/A  dated and filed May 19,
                2005, and incorporated herein by reference).

     10.25**    Amendment  No. 1 dated as of March 17, 2004, to the Amended
                and Restated Limited  Liability  Company Agreement dated as
                of December 31, 1998,  of Marathon  Ashland  Petroleum  LLC
                (filed  as  Exhibit  10.2 to  Ashland's  Form  10-Q for the
                quarter ended March 31, 2004,  and  incorporated  herein by
                reference).

     10.26*     Amendment No. 2 dated as of March 17, 2004, to the Put/Call
                Registration  Rights and Standstill  Agreement  dated as of
                January  1,  1998,   among   Marathon  Oil   Company,   USX
                Corporation,  Ashland Inc. and Marathon  Ashland  Petroleum
                LLC (filed as Exhibit 10.1 to  Ashland's  Form 10-Q for the
                quarter ended March 31, 2004,  and  incorporated  herein by
                reference).

     11         Computation  of Earnings Per Share  (appearing on page F-12
                of this annual report on Form 10-K).

     12         Computation of Ratio of Earnings to Fixed Charges.

     21         List of Subsidiaries.

     23.1       Consent of Independent Registered Public Accounting Firm.

     23.2       Consent of Tillinghast-Towers Perrin.

     23.3       Consent of Hamilton, Rabinovitz & Alschuler, Inc.

     23.4***    Consent of PricewaterhouseCoopers LLP.

     24         Power of Attorney,  including  resolutions  of the Board of
                Directors.

     31.1***    Certification of James J. O'Brien,  Chief Executive Officer
                of Ashland,  pursuant to Section 302 of the  Sarbanes-Oxley
                Act of 2002.

     31.2***    Certification of J. Marvin Quin, Chief Financial Officer of
                Ashland,  pursuant to Section 302 of the Sarbanes-Oxley Act
                of 2002.

     32***      Certification of James J. O'Brien,  Chief Executive Officer
                of Ashland,  and J. Marvin Quin, Chief Financial Officer of
                Ashland,  pursuant to Section 906 of the Sarbanes-Oxley Act
                of 2002.

     *Ashland  agrees to  supplement  this filing and furnish a copy of any
     omitted  schedule  to  the  United  States   Securities  and  Exchange
     Commission upon request.

     **Portions of this document have received confidential treatment.

     ***Filed herewith.

     Upon written or oral  request,  a copy of the above  exhibits  will be
furnished at cost.



                                 SIGNATURES

     Pursuant to the  requirements of Section 13 or 15(d) of the Securities
Exchange  Act of 1934,  the  registrant  has duly  caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

                                             ASHLAND INC.
                               ------------------------------------------
                                             (Registrant)

                               By:  /s/ J. Marvin Quin
                               -------------------------------------------
                                    J. Marvin Quin
                                    Senior Vice President and Chief
                                    Financial Officer


                               Date:   March 30, 2006




                               EXHIBIT INDEX

     23.4       Consent of PricewaterhouseCoopers LLP.

     31.1       Certification of James J. O'Brien,  Chief Executive Officer
                of Ashland,  pursuant to Section 302 of the  Sarbanes-Oxley
                Act of 2002.

     31.2       Certification of J. Marvin Quin, Chief Financial Officer of
                Ashland,  pursuant to Section 302 of the Sarbanes-Oxley Act
                of 2002.

     32         Certification of James J. O'Brien,  Chief Executive Officer
                of Ashland,  and J. Marvin Quin, Chief Financial Officer of
                Ashland,  pursuant to Section 906 of the Sarbanes-Oxley Act
                of 2002.



              MARATHON PETROLEUM COMPANY LLC AND SUBSIDIARIES
                 (FORMERLY MARATHON ASHLAND PETROLEUM LLC)



                 AUDITED CONSOLIDATED FINANCIAL STATEMENTS

                               June 30, 2005






                                  CONTENTS

                                                                                                                           PAGE

                                                                                                                        
REPORT OF INDEPENDENT AUDITORS                                                                                              1


CONSOLIDATED FINANCIAL STATEMENTS:

     CONSOLIDATED STATEMENTS OF INCOME -----------------------------------------------------------------------              2
     CONSOLIDATED BALANCE SHEETS -----------------------------------------------------------------------------              3
     CONSOLIDATED STATEMENTS OF CASH FLOWS -------------------------------------------------------------------              4
     CONSOLIDATED STATEMENTS OF MEMBERS' CAPITAL -------------------------------------------------------------              5


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS:

     NOTE A     -  BUSINESS DESCRIPTION AND BASIS OF PRESENTATION --------------------------------------------              6
     NOTE B     -  SUMMARY OF PRINCIPAL ACCOUNTING POLICIES --------------------------------------------------              6
     NOTE C     -  NEW ACCOUNTING STANDARDS ------------------------------------------------------------------             10
     NOTE D     -  PARTIAL REDEMPTION AND CHANGE IN OWNERSHIP ------------------------------------------------             11
     NOTE E     -  RELATED PARTY TRANSACTIONS ----------------------------------------------------------------             12
     NOTE F     -  OTHER ITEMS -------------------------------------------------------------------------------             14
     NOTE G     -  PENSIONS AND OTHER POSTRETIREMENT BENEFITS ------------------------------------------------             15
     NOTE H     -  INCOME TAXES ------------------------------------------------------------------------------             18
     NOTE I     -  INVENTORIES -------------------------------------------------------------------------------             19
     NOTE J     -  INVESTMENTS AND LONG-TERM RECEIVABLES -----------------------------------------------------             19
     NOTE K     -  PROPERTY, PLANT AND EQUIPMENT -------------------------------------------------------------             20
     NOTE L     -  GOODWILL ----------------------------------------------------------------------------------             20
     NOTE M     -  INTANGIBLE ASSETS -------------------------------------------------------------------------             20
     NOTE N     -  LONG-TERM DEBT ----------------------------------------------------------------------------             21
     NOTE O     -  ASSET RETIREMENT OBLIGATIONS --------------------------------------------------------------             21
     NOTE P     -  SUPPLEMENTAL CASH FLOW INFORMATION --------------------------------------------------------             22
     NOTE Q     -  LEASES ------------------------------------------------------------------------------------             22
     NOTE R     -  DERIVATIVE INSTRUMENTS --------------------------------------------------------------------             22
     NOTE S     -  FAIR VALUE OF FINANCIAL INSTRUMENTS -------------------------------------------------------             23
     NOTE T     -  CONTINGENCIES AND COMMITMENTS -------------------------------------------------------------             23
     NOTE U     -  ACCOUNTING STANDARDS NOT ADOPTED AT JUNE 30, 2005------------------------------------------             25





PRICEWATERHOUSECOOPERS LLP
                                        PricewaterhouseCoopers LLP
                                        1201 Louisiana, Suite 2900
                                        Houston, TX  77002-5678




                       REPORT OF INDEPENDENT AUDITORS

To the Board of Managers of
Marathon Petroleum Company LLC
(formerly Marathon Ashland Petroleum LLC):

In our  opinion,  the  accompanying  consolidated  balance  sheets  and the
related  consolidated  statements of income, of members' capital,  and cash
flows present fairly, in all material  respects,  the financial position of
Marathon  Petroleum  Company LLC (a wholly  owned  indirect  subsidiary  of
Marathon Oil Corporation) and its subsidiaries  (the "Company") at June 30,
2005 and December 31, 2004,  and the results of their  operations and their
cash flows for the six-month period ended June 30, 2005 and for each of the
two  years  in the  period  ended  December  31,  2004 in  conformity  with
accounting  principles  generally accepted in the United States of America.
These  financial   statements  are  the  responsibility  of  the  Company's
management.  Our responsibility is to express an opinion on these financial
statements based on our audits. We conducted our audits of these statements
in accordance  with  auditing  standards  generally  accepted in the United
States of America.  Those  standards  require  that we plan and perform the
audit to obtain reasonable assurance about whether the financial statements
are free of material misstatement.  An audit includes examining,  on a test
basis,  evidence  supporting  the amounts and  disclosures in the financial
statements,  assessing  the  accounting  principles  used  and  significant
estimates  made  by  management,   and  evaluating  the  overall  financial
statement  presentation.  We believe  that our audits  provide a reasonable
basis for our opinion.


/s/  PricewaterhouseCoopers LLP


March 24, 2006






                                     1






CONSOLIDATED STATEMENTS OF INCOME (Dollars in Millions)


MARATHON PETROLEUM COMPANY LLC AND SUBSIDIARIES


                                                                        SIX MONTHS ENDED          Year Ended December 31
                                                                           JUNE 30, 2005          2004                2003
                                                                          --------------      -------------       -------------
                                                                                                         
REVENUES AND OTHER INCOME:
       Sales and other operating revenues (including consumer
              excise taxes)                                               $     18,643        $     33,359        $     26,547
       Revenues from matching buy/sell transactions                              6,306               9,075               6,961
       Sales to related parties - Note E                                           647               1,046                 912
       Revenues from related party matching buy/sell transactions -
              Note E                                                                82                 150                  94
       Income from equity method investments                                        34                  81                  82
       Net gains on disposal of assets                                              12                  33                  42
       Other income (loss)                                                         (19)                 44                  30
                                                                          -------------       -------------       -------------

              Total revenues and other income                                   25,705              43,788              34,668
                                                                          ------------        -------------       -------------

COSTS AND EXPENSES:
       Cost of revenues (excludes items shown below)                            15,188              27,016              20,687
       Purchases related to matching buy/sell transactions                       6,207               8,883               6,991
       Purchases from related parties - Note E                                     374                 694                 711
       Purchases from related party matching buy/sell
              transactions - Note E                                                 77                 145                  89
       Consumer excise taxes                                                     2,294               4,463               4,285
       Depreciation and amortization                                               206                 412                 372
       Selling, general and administrative expenses                                320                 623                 581
       Other taxes                                                                  78                 142                 137
                                                                          -------------       -------------       -------------

              Total costs and expenses                                          24,744              42,378              33,853
                                                                          -------------       -------------       -------------

INCOME FROM OPERATIONS                                                             961               1,410                 815
Net interest and other financing income (costs) - Note F                            19                  (1)                 (9)
                                                                          -------------       -------------       -------------

INCOME BEFORE INCOME TAXES                                                         980               1,409                 806
Provision for income taxes - Note H                                                 36                   2                   5
                                                                          -------------       -------------       -------------

INCOME BEFORE CUMULATIVE EFFECT OF CHANGE
       IN ACCOUNTING PRINCIPLE                                                     944               1,407                 801
       Cumulative effect of change in accounting principle - Note C                 --                  --                  (2)
                                                                          -------------       -------------       -------------


NET INCOME                                                                $        944        $      1,407        $        799
                                                                          =============       =============       =============




     The accompanying notes are an integral part of these consolidated
                           financial statements.

                                     2






CONSOLIDATED BALANCE SHEETS (Dollars in Millions)


MARATHON PETROLEUM COMPANY LLC AND SUBSIDIARIES

                                                                                                 JUNE 30            December 31
                                                                                                  2005                2004
                                                                                              -------------       -------------
                                                                                                            
ASSETS:
       Current assets:
              Cash and cash equivalents                                                       $        877        $      1,576
              Receivables, less allowance for doubtful accounts of $2
                    and $6, respectively                                                             1,803               2,372
              Receivables from related parties - Note E                                                 76                  77
              Inventories - Note I                                                                   2,515               1,933
              Other current assets                                                                      77                  47
                                                                                              -------------       -------------
                           Total current assets                                                      5,348               6,005

       Investments and long-term receivables - Note J                                                  580                 553
       Property, plant and equipment - net - Note K                                                  4,860               4,781
       Deferred income tax benefits - Note H                                                             1                   1
       Goodwill - Note L                                                                                 21                  21
       Intangibles - net - Note M                                                                       68                  69
       Other noncurrent assets                                                                           9                   9
                                                                                              -------------       -------------

                           Total assets                                                       $     10,887        $     11,439
                                                                                              =============       =============

LIABILITIES:
       Current liabilities:
              Accounts payable                                                                $      4,080        $      3,584
              Payables to related parties - Note E                                                     112                  99
              Payroll and benefits payable                                                             132                 168
              Accrued taxes                                                                             68                  61
              Long-term debt due within one year                                                         2                   2
              Long-term debt due within one year to related party -
                    Notes E & N                                                                         16                  --
                                                                                              -------------       -------------
                           Total current liabilities                                                 4,410               3,914

       Long-term debt - Note N                                                                          40                  42
       Long-term debt payable to related party - Notes E & N                                           205                 122
       Deferred income taxes - Note H                                                                   26                   5
       Employee benefits obligations - Note G                                                          572                 563
       Asset retirement obligations - Note O                                                             3                   4
       Deferred credits and other liabilities                                                           65                  61
                                                                                              -------------       -------------

                           Total liabilities                                                         5,321               4,711
                                                                                              -------------       -------------

       Contingencies and commitments - Note T

MEMBERS' CAPITAL:
       Members' contributed capital                                                                  2,935               4,328
       Retained earnings                                                                             2,689               2,460
       Accumulated other comprehensive loss                                                            (58)                (60)
                                                                                              -------------       -------------
                           Total members' capital                                                    5,566               6,728
                                                                                              -------------       -------------

                           Total liabilities and members' capital                             $     10,887        $     11,439
                                                                                              =============       =============





     The accompanying notes are an integral part of these consolidated
                           financial statements.

                                     3






CONSOLIDATED STATEMENTS OF CASH FLOWS (Dollars in Millions)


MARATHON PETROLEUM COMPANY LLC AND SUBSIDIARIES

                                                                         SIX MONTHS ENDED         Year Ended December 31
                                                                           JUNE 30, 2005          2004                2003
                                                                          --------------      -------------       -------------
                                                                                                         
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS

OPERATING ACTIVITIES:
Net income                                                                $        944        $      1,407        $        799
Adjustments to reconcile to net cash provided from
       operating activities:
       Depreciation and amortization                                               206                 412                 372
       Pension and other postretirement benefits - net                              12                  25                  42
       Cumulative effect of change in accounting principle                          --                  --                   2
       Deferred income taxes                                                        21                  (1)                 --
       Net gains on disposal of assets                                             (12)                (33)                (42)
       Income from equity method investees                                         (34)                (81)                (82)
       Distributions from equity method investees                                   20                  80                  80
       Changes in:
              Current receivables                                                 (346)               (610)               (565)
              Inventories                                                         (582)                (39)                 21
              Accounts payable and other current liabilities                       468                 901                 631
              Receivables from/payables to related parties                          14                   9                 (16)
       All other - net                                                             (20)                 35                  30
                                                                          -------------       -------------       -------------
              Net cash provided from operating activities                          691               2,105               1,272
                                                                          -------------       -------------       -------------

INVESTING ACTIVITIES:
Capital expenditures                                                              (301)               (779)               (771)
Disposal of assets                                                                  20                  52                 181
Loan transactions  - principal loaned                                               --                 (35)                (27)
                   - principal collected                                             1                  36                  24
Restricted cash  - deposits                                                         (8)                (31)                (54)
                 - withdrawals                                                       3                  30                  93
Investments    -  contributions                                                     --                  (2)                (24)
               -  loans and advances                                                (1)                 (4)                 (4)
               -  returns and repayments                                            --                   4                  42
                                                                          -------------       -------------       -------------
              Net cash used in investing activities                               (286)               (729)               (540)
                                                                          -------------       -------------       -------------

FINANCING ACTIVITIES:
Revolving credit facilities  - borrowings - Notes E & N                             --               2,116               1,940
                             - repayments - Notes E & N                             --              (2,116)             (1,940)
Long-term debt    - borrowings - Notes E & N                                        99                 122                  --
                  - repayments - Note N                                             (1)                 (2)                 (2)
Member contributions                                                                --                  --                  11
Member distributions                                                              (715)                 --                (688)
Partial redemption of ownership interest - Note D                                 (487)                 --                  --
                                                                          -------------       -------------       -------------
              Net cash provided from (used in) financing activities             (1,104)                120                (679)
                                                                          -------------       -------------       -------------

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                              (699)              1,496                  53
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD                                 1,576                  80                  27
                                                                          -------------       -------------       -------------
CASH AND CASH EQUIVALENTS AT END OF PERIOD                                $        877        $      1,576        $         80
                                                                          =============       =============       =============

See Note P for supplemental cash flow information.






     The accompanying notes are an integral part of these consolidated
                           financial statements.

                                     4




CONSOLIDATED STATEMENTS OF MEMBERS' CAPITAL (Dollars in Millions)


MARATHON PETROLEUM COMPANY LLC AND SUBSIDIARIES

                                                      Members' Capital                      Comprehensive Income

                                             SIX MONTHS                                SIX MONTHS
                                                ENDED             Year Ended              ENDED              Year Ended
                                               JUNE 30           December 31             JUNE 30            December 31
                                                2005          2004          2003           2005          2004          2003
                                            -----------    -----------   -----------   -----------   -----------    -----------
                                                                                                  
MEMBERS' CONTRIBUTED CAPITAL:
     Balance at beginning of period         $    4,328     $    4,310    $    4,285
     Partial redemption of ownership
         interest - Note D                      (1,398)            --            --
     Member contributions                            5             18            25
                                            -----------    -----------   -----------
     Balance at end of period                    2,935          4,328         4,310
                                            -----------    -----------   -----------

RETAINED EARNINGS:
     Balance at beginning of period              2,460          1,053           942
     Net income                                    944          1,407           799    $      944    $    1,407     $     799
     Distributions to members                     (715)            --          (688)
                                            -----------    ----------    -----------
     Balance at end of period                    2,689          2,460         1,053
                                            -----------    -----------   -----------

ACCUMULATED OTHER COMPREHENSIVE
LOSS:
     Minimum pension liability adjustments:
         Balance at beginning of period            (60)           (76)          (38)
         Changes during the period                   2             16           (38)            2            16           (38)
                                            -----------    ----------    -----------
         Balance at end of period                  (58)           (60)          (76)
                                            -----------    -----------   -----------

     Deferred gains (losses) on derivative
     instruments:
         Balance at beginning of period             --             (2)           (3)
         Changes in fair value                      --              2            (1)           --             2            (1)
         Reclassification to income                 --             --             2            --            --             2
                                            -----------    -----------   -----------   -----------   -----------    -----------
         Balance at end of period                   --             --            (2)
                                            -----------    -----------   -----------

         TOTAL                                     (58)           (60)          (78)   $      946    $    1,425     $     762
                                            -----------    -----------   -----------   ===========   ===========    ===========

TOTAL MEMBERS' CAPITAL                      $    5,566     $    6,728    $    5,285
                                            ===========    ===========   ===========







     The accompanying notes are an integral part of these consolidated
                           financial statements.


                                     5


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

MARATHON PETROLEUM COMPANY LLC AND SUBSIDIARIES


NOTE A - BUSINESS DESCRIPTION AND BASIS OF PRESENTATION

On December 12, 1997,  Marathon  Oil Company  ("Marathon"),  a wholly owned
subsidiary  of Marathon  Oil  Corporation  ("MOC"),  formerly  known as USX
Corporation, entered into an Asset Transfer and Contribution Agreement with
Ashland Inc.  ("Ashland")  providing for the formation of Marathon  Ashland
Petroleum  LLC ("MAP").  Effective  January 1, 1998,  Marathon  contributed
substantially all of its refining,  marketing and  transportation  ("RM&T")
operations to MAP. Also, on January 1, 1998, Marathon acquired certain RM&T
net assets from Ashland in exchange  for a 38 percent  interest in MAP. The
purchase  price was  determined to be $1.9 billion,  based upon an external
valuation.  The acquisition of Ashland's net assets was accounted for under
the purchase method of accounting. In connection with the formation of MAP,
Marathon and Ashland  entered into a Limited  Liability  Company  Agreement
("LLC Agreement") dated January 1, 1998. The LLC Agreement  provided for an
initial term expiring on December 31, 2022 (25 years from its formation).

On June 30, 2005,  MOC acquired  the 38 percent  ownership  interest in MAP
previously  held by  Ashland.  In  addition,  MOC  acquired  a  portion  of
Ashland's  Valvoline  Instant  Oil Change  business,  its maleic  anhydride
business,  its interest in LOOP LLC  ("LOOP"),  which owns and operates the
only U.S.  deepwater  oil port,  and its  interest in LOCAP LLC  ("LOCAP"),
which  owns a crude  oil  pipeline.  As a result of the  transactions  (the
"Acquisition"),  MAP became  wholly  owned by MOC.  MAP changed its name to
Marathon Petroleum Company LLC ("MPC") effective September 1, 2005.

The total  consideration  for the Acquisition,  including debt assumed,  is
presented in Note D. The accompanying consolidated financial statements and
notes are as of June 30, 2005,  including the redemption of an 8.63 percent
ownership  interest  in MPC held by  Ashland  (the  "Partial  Redemption").
Subsequent  to June 30,  2005,  MPC's  portion of the  purchase  accounting
adjustments resulting from the Acquisition were pushed down to its separate
consolidated financial statements.

MPC is engaged in petroleum supply, refining,  marketing and transportation
operations,  primarily  in the  Midwest,  the upper  Great  Plains  and the
Southeastern  United States.  Speedway  SuperAmerica LLC ("SSA"),  a wholly
owned  subsidiary,  operates  retail  outlets for  petroleum  products  and
merchandise.  In  addition,  MPC,  through  its  wholly  owned  subsidiary,
Marathon Pipe Line LLC, is actively engaged in the pipeline  transportation
of crude oil and petroleum products.


NOTE B - SUMMARY OF PRINCIPAL ACCOUNTING POLICIES

PRINCIPLES APPLIED IN CONSOLIDATION - The consolidated financial statements
include the accounts of MPC and the  majority-owned  subsidiaries  which it
controls. Investments in undivided interest pipelines are consolidated on a
pro rata  basis.  Investments  in entities  over which MPC has  significant
influence,  but not control,  are  accounted for using the equity method of
accounting and are carried at MPC's share of net assets plus advances. This
includes  entities in which MPC holds  majority  ownership but the minority
shareholders  have  substantive   participating  rights  in  the  investee.
Differences in the basis of the investment and the separate net asset value
of the  investee,  if any,  are  amortized  into income over the  remaining
useful life of the underlying assets. Income from equity method investments
represents  MPC's  proportionate  share of income  generated  by the equity
method investees.

USE OF ESTIMATES - The  preparation  of financial  statements in accordance
with generally accepted  accounting  principles requires management to make
estimates and  assumptions  that affect the reported  amounts of assets and
liabilities  and the disclosure of contingent  assets and liabilities as of
the date of the consolidated  financial statements and the reported amounts
of revenues and expenses during the respective reporting periods.


                                     6

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE B - SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - CONTINUED

REVENUE  RECOGNITION - Revenues are recognized when products are shipped or
services  are  provided  to   customers,   the  sales  price  is  fixed  or
determinable and  collectibility  is reasonably  assured.  Costs associated
with revenues are recorded in cost of revenues.

Rebates from vendors are recognized as a reduction to cost of revenues when
the  initiating  transaction  occurs.  Incentives  that  are  derived  from
contractual  provisions are accrued based on past experience and recognized
within cost of revenues.

MATCHING   BUY/SELL   TRANSACTIONS  -  MPC  considers   matching   buy/sell
transactions  to be  arrangements  in which MPC  agrees  to buy a  specific
quantity  and  quality of crude oil or  refined  petroleum  products  to be
delivered at a specific  location while  simultaneously  agreeing to sell a
specified  quantity and quality of crude oil or refined petroleum  products
at a different location,  usually with the same counterparty.  All matching
buy/sell transactions are settled in cash and are recorded in both revenues
and costs of revenues as separate sales and purchase transactions,  or on a
"gross" basis. The commodity purchased and the commodity sold generally are
similar in nature.

In a typical  buy/sell  transaction,  MPC enters  into a contract to sell a
particular  grade of crude oil or refined  product at a specified  location
and date to a particular  counterparty,  and simultaneously agrees to buy a
particular grade of crude oil or refined product at a different location on
the same or another specified date,  typically from the same  counterparty.
The value of the  purchased  volumes  rarely  equals the sales value of the
sold  volumes.  The  value  differences  between  purchases  and  sales are
primarily   due   to  (1)   grade/quality   differentials,   (2)   location
differentials  and/or (3) timing  differences  in those  instances when the
purchase and sale do not occur in the same month.

MPC enters into crude oil matching buy/sell transactions to secure the most
profitable  refinery  supply  and  enters  into  refined  product  matching
buy/sell  transactions to meet projected customer demands and to secure the
required volumes in the most cost-effective manner.

The characteristics of MPC's matching buy/sell  transactions  include gross
invoicing  between MPC and its  counterparties  and cash  settlement of the
transactions.  Nonperformance  by one party to deliver  generally  does not
relieve the other party's obligation to perform.  Both transactions require
physical  delivery of the product.  The risks and rewards of ownership  are
evidenced   by  title   transfer,   assumption   of   environmental   risk,
transportation  scheduling,  credit risk, counterparty  nonperformance risk
and the fact that MPC has the primary obligation to perform.

MPC will be required to change its  accounting  for  purchases and sales of
inventory with the same  counterparty,  including certain matching buy/sell
transactions,  in the  second  quarter  of  2006.  See  Note U for  further
information.

CASH AND CASH EQUIVALENTS - Cash and cash equivalents  include cash on hand
and on deposit  and  investments  in highly  liquid debt  instruments  with
maturities  generally of three months or less.  See Note E for  information
regarding investments with related parties.

INVENTORIES - Inventories  are carried at lower of cost or market.  Cost of
inventories is determined  primarily under the last-in,  first-out ("LIFO")
method.

An inventory market  valuation  reserve results when the recorded LIFO cost
basis of crude oil and refined products  inventories exceeds net realizable
value. The reserve is decreased when market prices increase and inventories
turn over and is  increased  when market  prices  decrease.  Changes in the
inventory market valuation  reserve result in noncash charges or credits to
costs and expenses.

ACCOUNTS RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS - MPC's receivables
primarily consist of customer accounts  receivable,  including  proprietary
credit card  receivables.  The allowance for doubtful  accounts is the best
estimate  of the  amount of  probable  credit  losses in MPC's  proprietary
credit card  receivables.  MPC determines the allowance based on historical
write-off  experience and the volume of proprietary  credit card sales. MPC
reviews  the  allowance  for  doubtful  accounts  quarterly,  and  past-due
balances over 180 days are reviewed  individually for  collectibility.  All
other  customer  receivables  are  recorded  at the  invoiced  amounts  and
generally  do not  bear  interest.  Account  balances  for  these  customer
receivables  are  charged  directly  to bad debt  expense  when it  becomes
probable the receivable will not be collected.


                                     7



NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE B - SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - CONTINUED

TRADITIONAL  DERIVATIVE  INSTRUMENTS - MPC uses  derivatives  to manage its
exposure to commodity  price risk.  Management  has  authorized  the use of
futures,  forwards, swaps and combinations of options, including written or
net written options,  related to the purchase or sale of crude oil, natural
gas, refined products, feedstocks and ethanol. Changes in the fair value of
all derivatives are recognized  immediately in income,  in revenues,  other
income or cost of revenues.

As market conditions change, MPC may use selective  derivative  instruments
that assume market risk. For derivative  instruments that are classified as
trading,  changes in the fair  value are  recognized  immediately  in other
income.  Any  premium  received  is  amortized  into  income  based  on the
underlying settlement terms of the derivative position. All related effects
of a trading  strategy,  including  physical  settlement of the  derivative
position, are recognized in other income.

NONTRADITIONAL  DERIVATIVE  INSTRUMENTS - Certain  contracts  involving the
purchase or sale of  commodities  are not  considered  normal  purchases or
normal  sales  under  generally  accepted  accounting  principles  and  are
required to be accounted for as derivative instruments.  MPC refers to such
contracts  as  "nontraditional   derivative  instruments"  because,  unlike
traditional derivative instruments,  nontraditional  derivative instruments
have not been entered into to manage a risk  exposure.  Such  contracts are
recorded in the  balance  sheet at fair value and changes in fair value are
recognized in income as revenues or cost of revenues.

Certain  physical  commodity  contracts are  classified  as  nontraditional
derivative  instruments  because  certain volumes under these contracts are
physically  netted at particular  delivery  locations.  The netting process
causes all contracts at that delivery location to be considered  derivative
instruments.  Other  physical  contracts  that involve flash title are also
accounted  for as  nontraditional  derivative  instruments  as MPC  has not
elected to treat these contracts as normal purchases or normal sales.

PROPERTY,  PLANT AND EQUIPMENT - Property,  plant and equipment is recorded
at cost and  depreciated  on the  straight-line  method over the  estimated
useful lives of the assets, which range from 3 to 42 years. Such assets are
reviewed  for  impairment  whenever  events  or  changes  in  circumstances
indicate that the carrying  amount of an asset may not be  recoverable.  If
the sum of the expected future cash flows from the use of the asset and its
eventual  disposition  is less than the  carrying  amount of the asset,  an
impairment loss is recognized based on the fair value of the asset.

When property,  plant and equipment  depreciated on an individual basis are
sold or otherwise disposed of, any gains or losses are reflected in income.
Gains on disposal of property,  plant and  equipment  are  recognized  when
earned, which is generally at the time of closing. If a loss on disposal is
expected, such losses are recognized when the assets are classified as held
for  sale.  Proceeds  from  disposal  of  property,   plant  and  equipment
depreciated on a group basis are credited to accumulated  depreciation  and
amortization with no immediate effect on income.

GOODWILL - Goodwill  represents  the excess of the purchase  price over the
estimated  fair value of the net assets  acquired in the  acquisition  of a
business.  Such  goodwill  is not  amortized,  but  rather  is  tested  for
impairment  annually and when events or changes in  circumstances  indicate
that the fair value of a  reporting  unit with  goodwill  has been  reduced
below carrying value. The impairment test requires  allocating goodwill and
other assets and liabilities to reporting  units.  MPC is composed of three
reporting units: refining and marketing, pipeline transportation and retail
marketing. The fair value of each reporting unit is determined and compared
to the book value of the reporting unit. If the fair value of the reporting
unit is less than the book value,  including  goodwill,  then the  recorded
goodwill is impaired to its implied fair value with a charge to expense.


INTANGIBLE ASSETS - Intangible assets primarily include intangible contract
rights,  marketing branding agreements and unrecognized  pension plan prior
service costs. The amortizable  intangible  assets are amortized over their
estimated useful lives or the expected lives of the related  contracts,  as
applicable,  which range from five to ten years.  Such assets are  reviewed
for impairment  whenever events or changes in  circumstances  indicate that
the carrying amount of an asset may not be  recoverable.  If the sum of the
expected  future  cash  flows  from the use of the asset  and its  eventual
disposition  is less than the carrying  amount of the asset,  an impairment
loss is recognized based on the fair value of the asset.

MAJOR MAINTENANCE  ACTIVITIES - MPC incurs costs for planned major refinery
maintenance ("turnarounds"). These types of costs include contractor repair
services,  materials  and  supplies,  equipment  rentals and company  labor
costs.  Such costs are  expensed  in the same  annual  period as  incurred;
however,  estimated  annual  turnaround  costs are  recognized  as  expense
throughout the year on a pro rata basis.


                                     8

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE B - SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - CONTINUED

ENVIRONMENTAL   REMEDIATION   LIABILITIES   -   Environmental   remediation
expenditures  are  capitalized if the costs mitigate past or prevent future
contamination or if the costs improve environmental safety or efficiency of
the existing assets.  MPC provides for remediation costs and penalties when
the  responsibility  to remediate is probable and the amount of  associated
costs can be  reasonably  estimated.  The  timing of  remediation  accruals
coincides  with  completion of a feasibility  study or the  commitment to a
formal  plan of  action.  Remediation  liabilities  are  accrued  based  on
estimates  of known  environmental  exposure  and are  discounted  when the
estimated amounts are reasonably fixed and  determinable.  If recoveries of
remediation costs from third parties are probable, a receivable is recorded
and is  discounted  when the  estimated  amount  is  reasonably  fixed  and
determinable.

ASSET  RETIREMENT  OBLIGATIONS  -  The  fair  values  of  asset  retirement
obligations  are  recognized  in the period in which they are incurred if a
reasonable estimate of fair value can be made. Asset retirement obligations
have been  recognized for the removal of equipment at certain leased retail
marketing  locations  and  closure  of  a  waste  remediation  site.  Asset
retirement  obligations  have  not  been  recognized  for  the  removal  of
materials and equipment from or the closure of certain  refinery,  pipeline
and marketing assets because the fair value cannot be reasonably  estimated
due to an indeterminate settlement date of the obligation.

Current  inflation rates and  credit-adjusted-risk-free  interest rates are
used  to  estimate  the  fair  values  of  asset  retirement   obligations.
Depreciation of capitalized  asset  retirement costs and accretion of asset
retirement  obligations  are  recorded  over time.  The  depreciation  will
generally be determined on a straight-line basis for refining and marketing
facilities,  while the  accretion to be  recognized  will escalate over the
lives of the assets.

PENSIONS  AND OTHER  POSTRETIREMENT  BENEFITS  - MPC has a  noncontributory
defined  benefit pension plan with two benefit  payment  formulas  covering
substantially  all employees.  In addition,  several excess  benefits plans
exist covering  employees within defined  regulatory  compensation  limits.
Benefits under its final pay formula are based primarily upon age, years of
participation in the plan and the highest consecutive three years' earnings
during the last ten years  before  retirement.  Benefits  under its pension
equity formula are based primarily upon age, years of  participation in the
plan and the final three years of earnings at retirement.

MPC also has  defined  benefit  plans  for  other  postretirement  benefits
covering  most  employees.   Health  care  benefits  are  provided  through
comprehensive  hospital,  surgical and major  medical  benefit  provisions,
subject to various  cost  sharing  features.  Life  insurance  benefits are
provided to certain nonunion and union-represented  retiree  beneficiaries.
Other postretirement benefits have not been funded in advance.

MPC  uses a  December  31  measurement  date  for  its  pension  and  other
postretirement  benefit plans unless circumstances  require a remeasurement
at an interim date.

STOCK-BASED  COMPENSATION - Effective  January 1, 2003, MPC has applied the
fair value based method of accounting to all grants and any modified grants
for MOC  stock-based  compensation  granted  to MPC  employees.  All  prior
outstanding  and unvested  awards  continue to be  accounted  for under the
intrinsic value method.  The following table  illustrates the effect on net
income if the fair value  method had been  applied to all  outstanding  and
unvested awards in each period:



                                                                           SIX MONTHS
                                                                             ENDED                Year Ended December 31
                                                                            6/30/2005             2004                2003
                                                                          -------------       -------------       -------------
                                                                                               (Millions)
                                                                                                         
Net income:
       As reported                                                        $        944        $      1,407        $        799
       Add:     MOC stock-based employee compensation expense
                included in reported net income                                      3                   6                   2
       Deduct:  MOC stock-based employee compensation expense
                determined under fair value method for all awards                   (3)                 (6)                 (2)
                                                                          -------------       -------------       -------------

Pro forma net income                                                      $        944        $      1,407        $        799
                                                                          =============       =============       =============




                                     9

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE B - SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - CONTINUED

MPC  records  compensation  cost over the stated  vesting  period for stock
options  that are subject to specific  vesting  conditions  and specify (1)
that an employee vests in the award upon becoming "retirement  eligible" or
(2) that the employee will  continue to vest in the award after  retirement
without  providing any  additional  service.  Upon adoption of Statement of
Financial   Accounting   Standards   ("SFAS")  No.  123   (Revised   2004),
"Share-Based   Payment,"   such   compensation   cost  will  be  recognized
immediately for awards granted to retirement-eligible employees or over the
period from the grant date to the retirement eligibility date if retirement
eligibility  will  be  reached  during  the  stated  vesting  period.   The
compensation  cost  determined  under these two  approaches  did not differ
materially for the periods presented above.

The  above  MOC   stock-based   compensation   amounts   were  based  on  a
Black-Scholes   option-pricing   model,   which   included  the   following
information and assumptions:


                                                                           SIX MONTHS
                                                                             ENDED                Year Ended December 31
                                                                           6/30/2005             2004                2003
                                                                          -------------       -------------       -------------
                                                                                                         
Weighted-average grant date exercise price per share                      $      50.28        $      33.61        $      25.58
Expected annual dividends per share                                       $       1.32        $       1.00        $       0.97
Expected life in years                                                             5.5                 5.5                 5.0
Expected volatility                                                                 28%                 32%                 34%
Risk-free interest rate                                                            3.8%                3.9%                3.0%
Weighted-average grant date fair value of options granted
       during the period, as calculated from above                        $      12.30        $       8.83        $       5.37


MPC applies the  principles of SFAS No. 123,  "Accounting  for  Stock-Based
Compensation"  ("SFAS No. 123"),  as  interpreted  by Emerging  Issues Task
Force ("EITF") Issue No. 96-18, "Accounting for Equity Instruments That Are
Issued to Other  than  Employees  for  Acquiring,  or in  Conjunction  with
Selling, Goods or Services," to the stock-based compensation granted to MPC
employees by Ashland.

The  amounts  of MOC  and  Ashland  stock-based  compensation  recorded  in
selling,  general  and  administrative  expenses  totaled $5  million,  $14
million  and $6 million  during the six months  ended June 30, 2005 and the
years ended December 31, 2004 and 2003, respectively.

INCOME TAXES - MPC is a limited liability  company,  and therefore,  except
for several small subsidiary  corporations,  is not subject to U.S. federal
income taxes.  Accordingly,  the taxable  income or loss resulting from the
operations of MPC is  ultimately  included in the U.S.  federal  income tax
returns of MOC and  Ashland.  MPC is,  however,  subject to income taxes in
certain state, local and foreign jurisdictions.

Deferred tax assets and liabilities are recognized for the estimated future
tax  consequences   attributable  to  differences   between  the  financial
statement carrying amounts of assets and liabilities and their tax bases as
reported in MPC's  filings  with the  respective  taxing  authorities.  The
realization of deferred tax assets is assessed  periodically based on MPC's
expectation to generate sufficient future taxable income.

CONCENTRATION  OF CREDIT  RISK - MPC is exposed to credit risk in the event
of  nonpayment  by  counterparties,  a  significant  portion  of which  are
concentrated  in  energy-related   industries.   The   creditworthiness  of
customers  and  other  counterparties  is  subject  to  continuing  review,
including  the use of master  netting  agreements,  where  appropriate.  No
single customer accounts for more than 10 percent of annual gross revenues.

RECLASSIFICATIONS  - Certain  reclassifications  of prior  years' data have
been made to conform to 2005 classifications.


NOTE C - NEW ACCOUNTING STANDARDS

Effective July 1, 2004, MPC adopted  Financial  Accounting  Standards Board
("FASB")  Staff Position No. FAS 106-2 ("FSP FAS 106-2"),  "Accounting  and
Disclosure   Requirements  Related  to  the  Medicare   Prescription  Drug,
Improvement  and  Modernization  Act of 2003"  (the  "Act").  FSP FAS 106-2
includes  guidance on recognizing the effects of the new legislation  under
the  various   conditions   surrounding   the   assessment   of  "actuarial
equivalence." MPC has determined, based on available regulatory guidance,



                                    10

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE C - NEW ACCOUNTING STANDARDS - CONTINUED

that the postretirement  plan's  prescription drug benefits are actuarially
equivalent   to  the  Medicare   "Part  D"  benefit   under  the  Act.  The
subsidy-related reduction at July 1, 2004 in the accumulated postretirement
benefit  obligation for the MPC  postretirement  plan was $49 million.  The
favorable  pretax effect of the  subsidy-related  reduction for 2004 on the
measurement  of the net  periodic  postretirement  benefit  cost related to
service cost, interest cost and actuarial gain amortization was $4 million.

Effective January 1, 2003, MPC adopted SFAS No. 143,  "Accounting for Asset
Retirement Obligations." The transition adjustment related to adopting SFAS
No. 143 was  recognized  as a cumulative  effect of a change in  accounting
principle. The cumulative effect on net income of adopting SFAS No. 143 was
a net  unfavorable  pretax  effect of $2 million.  At the time of adoption,
total  assets  increased  by less than $1  million  and  total  liabilities
increased $2 million.

Effective   January  1,  2003,  MPC  adopted  the  fair  value  recognition
provisions of SFAS No. 123 for the stock-based  compensation granted to MPC
employees by MOC. SFAS No. 148, "Accounting for Stock-Based  Compensation -
Transition  and  Disclosure,"  an  amendment  of  SFAS  No.  123,  provides
alternative  methods for the transition of the  accounting for  stock-based
compensation from the intrinsic value method to the fair value method.  MPC
has applied the fair value method to grants made, modified or settled on or
after January 1, 2003.


NOTE D - PARTIAL REDEMPTION AND CHANGE IN OWNERSHIP

The total  consideration  for the Acquisition,  including debt assumed,  is
shown in the following table. The cash and MPC accounts receivable included
in the purchase price, which total $1,398 million,  were distributed by MPC
to Ashland in the Partial  Redemption.  Immediately  following that part of
the  Acquisition  transactions,  MOC provided the other  components  of the
total   consideration  to  Ashland  in  exchange  for  Ashland's  remaining
ownership interest in MPC.



                                                                                               (Millions)
                                                                                              ------------
                                                                                           
       Cash (a)                                                                               $        487
       MPC accounts receivable (a)                                                                     911
       MOC common stock (b)                                                                            955
       Estimated additional consideration related to tax matters                                        58
       Transaction-related costs                                                                        10
                                                                                              ------------
              Purchase price                                                                         2,421
       Assumption of debt (c)                                                                        1,920
                                                                                              ------------
              Total consideration including debt assumption (d)                               $      4,341
                                                                                              ============


(a)      The LLC Agreement was amended to eliminate the requirement for MPC
         to make  quarterly  cash  distributions  to  Marathon  and Ashland
         between the date the principal transaction  agreements were signed
         and  the  closing  of  the  Acquisition.  Cash  and  MPC  accounts
         receivable above included $506 million  representing  Ashland's 38
         percent of MPC's distributable cash as of June 30, 2005.
(b)      Ashland  shareholders  received  17.539  million  shares valued at
         $54.45 per share,  which was MOC's average common stock price over
         the trading days  between June 23 and June 29, 2005.  The exchange
         ratio was  designed to provide an  aggregate  number of MOC shares
         worth $915 million based on MOC's  average  common stock price for
         each of the 20  consecutive  trading  days  ending  with the third
         complete trading day prior to June 30, 2005.
(c)      Assumed debt was repaid by MOC on July 1, 2005.
(d)      MOC is  entitled  to  the  tax  deductions  for  Ashland's  future
         payments of certain contingent  liabilities  related to businesses
         previously owned by Ashland. However, pursuant to the terms of the
         Tax Matters  Agreement,  MOC has agreed to reimburse Ashland for a
         portion of these future  payments.  This contingent  consideration
         will be included in the purchase  price as such  payments are made
         to Ashland.

                                    11

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE E - RELATED PARTY TRANSACTIONS

Related parties include:
   o     Ashland and its affiliates;
   o     MOC and its affiliates; and
   o     Equity method investees. Principal unconsolidated equity investees
         of MPC, at June 30, 2005, which are accounted for under the equity
         method of accounting, were as follows:



                                 Company                Ownership                           Activity
                                 -------                ---------                           --------

                                                                         
              Centennial Pipeline LLC ("Centennial")       50.0%                Refined products pipeline system
              Pilot Travel Centers LLC ("PTC")             50.0%                Travel centers
              LOCAP                                        49.9%                Crude oil pipeline system
              LOOP                                         46.7%                Offshore crude oil unloading port
              Minnesota Pipe Line Company                  33.3%                Crude oil pipeline system
              Southcap Pipe Line Company                   21.6%                Crude oil pipeline system


Management  believes that  transactions with related parties were conducted
under terms comparable to those with unrelated parties.



                                                                           SIX MONTHS
                                                                             ENDED                Year Ended December 31
                                                                            6/30/2005             2004                2003
                                                                          -------------       -------------       ------------
                                                                                               (Millions)
                                                                                                         
REVENUES FROM RELATED PARTIES WERE:
       Ashland and its affiliates                                         $      132          $      274          $       258
       MOC and its affiliates                                                     83                 153                   97
       Equity method investees:
              PTC                                                                482                 715                  635
              Centennial                                                          30                  49                   16
              Other                                                                2                   5                   --
                                                                          -----------         -----------          -----------
                    Total                                                 $      729          $    1,196           $    1,006
                                                                          ===========         ===========          ===========

Related  party  sales to Ashland  and its  affiliates,  PTC and  Centennial
consist primarily of refined petroleum products. Related party sales to MOC
and its  affiliates  consist  primarily  of  crude  oil  matching  buy/sell
transactions.




                                                                           SIX MONTHS
                                                                             ENDED                Year Ended December 31
                                                                            6/30/2005             2004                2003
                                                                          -------------       -------------       ------------
                                                                                               (Millions)
                                                                                                         
PURCHASES FROM RELATED PARTIES WERE:
       Ashland and its affiliates                                         $       12          $       22          $        24
       MOC and its affiliates                                                    355                 685                  659
       Equity method investees:
              PTC                                                                  4                   8                   --
              Centennial                                                          44                  56                   49
              LOOP                                                                20                  44                   46
              Other                                                               16                  24                   22
                                                                          -----------         -----------          -----------
                    Total                                                 $      451          $      839           $      800
                                                                          ===========         ===========          ===========


Related party purchases from Ashland and its affiliates  consist  primarily
of refined petroleum products and the net amount of administrative services
provided  between the companies.  Related party  purchases from MOC and its
affiliates  consist  primarily of crude oil  (including  matching  buy/sell
transactions),  natural gas and refinery  feedstocks  and the net amount of
administrative  services  provided  between the  companies.  Related  party
purchases from PTC consist primarily of refined petroleum  products and the
net amount of  administrative  services  provided  between  the  companies.
Related party purchases from Centennial consist



                                    12

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE E - RELATED PARTY TRANSACTIONS - CONTINUED

primarily of transmix and refined  product  transportation.  Related  party
purchases from LOOP and other equity method investees  consist primarily of
crude oil transportation.


                                                                                                       JUNE 30       December 31
                                                                                                         2005           2004
                                                                                                     -----------     -----------
                                                                                                              (Millions)
                                                                                                               
RECEIVABLES FROM RELATED PARTIES WERE:
       Ashland and its affiliates                                                                    $       29      $       18
       MOC and its affiliates                                                                                24              24
       Equity method investees:
              PTC                                                                                             2              19
              Centennial                                                                                     21              16
                                                                                                     -----------     -----------
                    Total                                                                            $       76      $       77
                                                                                                     ===========     ===========

PAYABLES TO RELATED PARTIES WERE:
       Ashland and its affiliates                                                                    $        3      $       --
       MOC and its affiliates                                                                                86              81
       Equity method investees:
              Centennial                                                                                     18              12
              LOOP                                                                                            3               3
              Other                                                                                           2               3
                                                                                                     -----------     -----------
                    Total                                                                            $      112      $       99
                                                                                                     ===========     ===========



A revolving  credit agreement was entered into as of January 1, 1998, among
Ashland and Marathon  (collectively  "the Lenders") and MPC. This agreement
provided  that the Lenders  could loan to MPC up to $500 million at defined
short-term  market  rates.  Pursuant  to the  terms of MOC's  agreement  to
acquire  the 38 percent  ownership  interest  in MPC held by  Ashland,  MPC
effectively  was  restricted  from  borrowing  under  this  facility  after
September 30, 2004.  This  facility  expired on March 15, 2005. At December
31, 2004, there were no borrowings against this facility, and there were no
borrowings against this facility during 2005. During 2004, MPC borrowed and
repaid  $1,717  million  under  this   revolving   credit   facility.   The
weighted-average   borrowings   outstanding  under  this  revolving  credit
facility during 2004 were $27 million.  During the years ended December 31,
2004 and 2003,  interest  paid to each of  Marathon  and  Ashland  on these
borrowings was less than $1 million.

Effective  August  1,  2003,  MPC  entered  into a $350  million  committed
revolving  credit  facility  with MOC that  terminated on January 31, 2005.
There were no borrowings against this facility during 2005 and 2003. During
2004,  MPC had  borrowings  and  repayments  of  $399  million  under  this
facility.  During 2004,  interest paid to MOC on the borrowings  under this
agreement  was  less  than  $1  million.  The  weighted-average  borrowings
outstanding under this note facility during 2004 were $3 million.

On March 17, 2004,  MPC entered into a $325 million  project loan agreement
with Marathon, whereby MPC may borrow funds to finance the Detroit refinery
expansion project at a rate of 6 percent per annum. During the construction
period, interest was added to the outstanding loan balance. Upon completion
of  this  expansion  project,  the  Detroit  refinery  cash  flows  will be
dedicated  to  service  this debt as the sole  source of funds to repay the
borrowings.  At June 30, 2005 and December  31, 2004,  MPC had a balance of
$221  million  and  $122  million,  respectively,  outstanding  under  this
agreement.  The amount of interest  that has been incurred and added to the
loan balance is $8 million as of June 30, 2005.  Repayments are expected to
begin in 2006.

On November 16, 1998,  MPC entered  into  agreements  with MOC and Ashland,
which  allowed MPC to invest its surplus cash  balances on a daily basis at
competitive  interest  rates with MOC and Ashland in proportion up to their
ownership interests in MPC.


                                    13

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE E - RELATED PARTY TRANSACTIONS - CONTINUED

These  agreements  were  cancelled on April 2, 2004. MPC did not invest any
cash under  these  agreements  in 2004.  Effective  February  4, 2005,  the
agreement with Ashland was reactivated and then  effectively  terminated as
of June 30, 2005.  Interest income earned from Ashland on these investments
was less than $1 million  during the six months ended June 30, 2005 and the
year ended  December 31,  2003.  Interest  income  earned from MOC on these
investments was less than $1 million for the year ended December 31, 2003.

Pursuant  to the  terms  of  MOC's  agreement  to  acquire  the 38  percent
ownership in MPC held by Ashland,  there were no cash capital contributions
made to MPC  after  September  30,  2004.  In 2004 and 2003,  MPC  recorded
capital contributions from Marathon of less than $1 million and $1 million,
respectively,  and from Ashland of $4 million and $7 million, respectively,
for  environmental  improvements.  In 2003 MPC also recorded an $11 million
capital  contribution  from Marathon  related to the  acquisition of leased
property. The LLC Agreement stipulated that ownership interest in MPC would
not be adjusted as a result of such contributions.

MPC  recorded   noncash  capital   contributions   related  to  stock-based
compensation  expense  from  Marathon  of $3  million,  $6  million  and $2
million,  in the six  months  ended  June 30,  2005,  and the  years  ended
December 31, 2004 and 2003,  respectively.  This  stock-based  compensation
expense is allocated 100 percent to Marathon.

MPC  recorded   noncash  capital   contributions   related  to  stock-based
compensation expense from Ashland of $2 million, $8 million and $4 million,
in the six months  ended June 30,  2005,  and the years ended  December 31,
2004 and 2003,  respectively.  This  stock-based  compensation  expense  is
allocated 100 percent to Ashland.


NOTE F - OTHER ITEMS


                                                                           SIX MONTHS
                                                                             ENDED                Year Ended December 31
                                                                            6/30/2005             2004                2003
                                                                          -------------       -------------       ------------
                                                                                               (Millions)
                                                                                                         
NET INTEREST AND OTHER FINANCING COSTS:

       INTEREST AND OTHER FINANCIAL INCOME:
              Interest income - third parties                             $       23          $       10           $        2
              Interest income - related parties                                    1                  --                   --
              Foreign currency adjustments                                        --                   2                   --
                                                                          ----------          -----------          -----------
                    Total                                                         24                  12                    2
                                                                          ----------          -----------          -----------

       INTEREST AND OTHER FINANCING COSTS:
              Interest incurred - third parties                                    2                   3                    2
              Interest incurred - related parties                                  5                   3                   --
              Less interest capitalized                                            7                   2                   --
                                                                          -----------         -----------          -----------
                    Net interest                                                  --                   4                    2
              Interest on tax issues                                               1                   1                    2
              Bank fees and other                                                  4                   8                    7
                                                                          -----------         -----------          -----------
                    Total                                                          5                  13                   11
                                                                          -----------         -----------          -----------

              Net interest and other financing income (costs)             $       19          $       (1)          $       (9)
                                                                          ===========         ===========          ===========




                                    14

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE G - PENSIONS AND OTHER POSTRETIREMENT BENEFITS

OBLIGATIONS AND FUNDED STATUS

The  following  summarizes  the  obligations  and  funded  status for MPC's
pension and other postretirement benefit plans:



                                                                     Pension Benefits                         Other Benefits
                                                                  ---------------------                    ---------------------
                                                                     SIX                                     SIX
                                                                     MONTHS       Year                       MONTHS       Year
                                                                     ENDED       Ended                       ENDED       Ended
                                                                   6/30/2005  12/31/2004                   6/30/2005   12/31/2004
                                                                  ----------  ----------                   ---------   ----------
                                                                                              (Millions)
                                                                                                           
CHANGE IN BENEFIT OBLIGATIONS:
Benefit obligations at beginning of period                        $  1,203    $  1,051                     $    341    $    346
Service cost                                                            40          70                            7          15
Interest cost                                                           35          64                           10          20
Actuarial (gains) losses                                                34         114                           (2)        (34)(a)
Plan amendment                                                          --          --                            9          --
Settlement payments                                                     --          (4)                          --          --
Benefits paid                                                          (37)        (92)                          (5)         (6)
                                                                  ---------   ---------                    ---------   ---------
Benefit obligations at end of period                              $  1,275    $  1,203                     $    360    $    341
                                                                  =========   =========                    =========   =========

CHANGE IN PLAN ASSETS:
Fair value of plan assets at beginning of period                  $    535    $    473
Actual return on plan assets                                             2          44
Employer contributions                                                  68         114
Settlement payments                                                     --          (4)
Benefits paid from plan assets                                         (37)        (92)
                                                                  ---------   ---------
Fair value of plan assets at end of period                        $    568    $    535
                                                                  =========   =========

FUNDED STATUS OF PLANS AT END OF PERIOD:                           $  (707)   $   (668)                    $   (360)   $   (341)
Unrecognized net transition asset                                       (1)         (2)                          --          --
Unrecognized prior service costs (benefits)                             17          18                          (15)        (26)
Unrecognized net losses                                                542         502                           58          61
                                                                  ---------   ---------                    ---------   ---------
Accrued benefit cost                                              $   (149)   $   (150)                    $   (317)   $   (306)
                                                                  =========   =========                    =========   =========

AMOUNTS RECOGNIZED IN THE CONSOLIDATED BALANCE SHEET:
Accrued benefit liability                                         $   (226)   $   (230)                    $   (317)   $   (306)
Intangible asset                                                        19          20                           --          --
Accumulated other comprehensive loss                                    58          60                           --          --
                                                                  ---------   ---------                    ---------   ---------
Accrued benefit cost                                              $   (149)   $   (150)                    $   (317)   $   (306)
                                                                  =========   =========                    =========   =========


(a) Includes the impact related to the Act, which reduced the obligation by
$49 million.

The  accumulated  benefit  obligation for all defined benefit pension plans
was $791  million and $763  million at June 30, 2005 and December 31, 2004,
respectively.

All MPC defined benefit pension plans have accumulated benefit obligations
in excess of plan assets as summarized below:



                                                                   JUNE 30    December 31
                                                                     2005         2004
                                                                  ----------  -----------
                                                                        (Millions)
                                                                        
              Projected benefit obligations                       $  (1,275)  $  (1,203)
              Accumulated benefit obligations                          (791)       (763)
              Fair value of plan assets                                 568         535



                                    15

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE G - PENSIONS AND OTHER POSTRETIREMENT BENEFITS - CONTINUED


NET PERIODIC BENEFIT COST

The following  summarizes the net periodic  benefit costs for MPC's pension
and other postretirement benefit plans:



                                                                Pension Benefits                        Other Benefits
                                                      --------------------------------         ---------------------------------
                                                          SIX                                     SIX
                                                        MONTHS          Year Ended              MONTHS         Year Ended
                                                         ENDED          December 31              ENDED         December 31
                                                       6/30/2005     2004        2003          6/30/2005     2004        2003
                                                      ----------  ---------   ---------        ---------   ---------   ---------
                                                                                      (Millions)
                                                                                                     
COMPONENTS OF NET PERIODIC BENEFIT COST:
     Service cost                                     $     40    $     70    $     64         $      7    $     15    $     15
     Interest cost                                          35          64          59               10          20          20
     Expected return on plan assets                        (24)        (45)        (40)              --          --          --
     Amortization  - net transition gain                    (1)         (2)         (2)              --          --          --
                   - prior service costs (credits)           1           2           3               (3)         (7)         (7)
                   - actuarial loss                         16          23          20                1           3           4
     Multi-employer and other plans                          1           2           2                1           3           2
     Settlement, curtailment and termination loss           --           2          --               --          --          --
                                                      ---------   ---------   ---------        ---------   ---------   ---------
     Net periodic benefit cost                        $     68    $    116    $    106         $     16    $     34    $     34
                                                      =========   =========   =========        =========   =========   =========

Increase (decrease) in minimum liability in
     other comprehensive loss                         $     (2)   $    (16)   $     38              N/A         N/A         N/A



PLAN ASSUMPTIONS

The  following  summarizes  the  assumptions  used to determine the benefit
obligation  and net  periodic  benefit  costs for MPC's  pension  and other
postretirement benefit plans:



                                                                Pension Benefits                        Other Benefits
                                                      ---------------------------------        ---------------------------------
                                                        JUNE 30           December 31             JUNE 30         December 31
                                                         2005          2004        2003            2005         2004        2003
                                                         ----          ----        ----            ----        -----       -----
WEIGHTED-AVERAGE ASSUMPTIONS USED TO
DETERMINE BENEFIT OBLIGATION AT:
                                                                                                     
     Discount rate                                        5.75%       5.75%       6.25%            5.75%       5.75%       6.25%
     Rate of compensation increase                        4.50%       4.50%       4.50%            4.50%       4.50%       4.50%




                                                                Pension Benefits                        Other Benefits
                                                      ---------------------------------        ---------------------------------
                                                          SIX                                     SIX
                                                        MONTHS           Year Ended              MONTHS           Year Ended
                                                        ENDED            December 31             ENDED            December 31
                                                      6/30/2005        2004        2003        6/30/2005        2004        2003
                                                      ---------       -----       -----        ---------      ------      ------
                                                                                                         
WEIGHTED-AVERAGE ACTUARIAL ASSUMPTIONS
USED TO DETERMINE NET PERIODIC BENEFIT
COST:
     Discount rate                                        5.75%       6.25%       6.50%            5.75%       6.25%       6.50%
     Expected long-term return on
         plan assets                                      8.50%       9.00%       9.00%             N/A         N/A         N/A
     Rate of compensation increase                        4.50%       4.50%       4.50%            4.50%       4.50%       4.50%



                                    16

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE G - PENSIONS AND OTHER POSTRETIREMENT BENEFITS - CONTINUED

DISCOUNT  RATES  - MPC  develops  demographics  and  utilizes  the  work of
third-party  actuaries to assist in the measurement of benefit  obligations
and net periodic  benefit costs. In determining the assumed discount rates,
the method  includes a review of market  yields on  high-quality  corporate
debt and use of a third-party  actuary's  discount rate modeling tool. This
tool applies a yield curve to the projected benefit plan cash flows using a
hypothetical  Aa yield  curve.  The  yield  curve  represents  a series  of
annualized  individual  discount rates from 1.5 to 30 years. The bonds used
are rated Aa or higher by a recognized rating agency, and only non-callable
bonds are  included.  Each issue is required to have at least $150  million
par value  outstanding.  The top quartile  bonds are  selected  within each
maturity group to construct the yield curve.

EXPECTED  LONG-TERM RETURN ON PLAN ASSETS - Historical  markets are studied
and long-term  historical  relationships  between equities and fixed income
are preserved  consistent with the widely accepted capital market principle
that assets with higher volatility  generate a greater return over the long
run.  Certain  components  of  the  asset  mix  are  modeled  with  various
assumptions  regarding  inflation,  debt  returns  and  stock  yields.  Our
assumptions are compared to those of peer companies and historical  returns
for reasonableness and appropriateness.

ASSUMED HEALTH CARE COST TREND RATES AT:



                                                                                                JUNE 30        December 31
                                                                                                 2005        2004        2003
                                                                                               ---------   ---------   ---------
                                                                                                              
     Health care cost trend rate assumed for next year                                              8.5%        9.0%        9.5%
     Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)              5.0%        5.0%        5.0%
     Year that the rate reaches the ultimate trend rate                                             2012        2012        2012


Assumed  health  care cost  trend  rates have a  significant  effect on the
amounts  reported for the retiree health care plan. A  one-percentage-point
change in assumed  health care cost trend  rates  would have the  following
effects:



                                                                                             1 Percentage         1 Percentage
                                                                                            Point Increase      Point Decrease
                                                                                            --------------      ----------------
                                                                                                        (Millions)
                                                                                                          
Effect on total of service and interest cost components                                     $            8      $            (6)
Effect on other postretirement benefit obligations                                                      81                  (68)



PLAN ASSETS

The pension plan's weighted-average asset allocations by asset category are
as follows:



                                                                                                JUNE 30           December 31
                                                                                                  2005                2004
                                                                                             ---------------    ----------------
                                                                                                           
Asset category:
       Equity securities                                                                                 79%                 78%
       Debt securities                                                                                   19%                 21%
       Real estate                                                                                        2%                  1%
                                                                                             ---------------    ----------------
              Total                                                                                     100%                100%
                                                                                             ===============    ================



PLAN  INVESTMENT  POLICIES AND STRATEGIES - The investment  policy reflects
the funded  status of the plan and MPC's  future  ability  to make  further
contributions.  Historical performance and future expectations suggest that
common   stocks  will  provide   higher  total   investment   returns  than
fixed-income  securities over a long-term  investment horizon. As a result,
equity  investments  will likely continue to exceed 50 percent of the value
of the fund.  Accordingly,  bond and other  fixed-income  investments  will
comprise the remainder of the fund.  Short-term  investments  shall reflect
the liquidity requirements for making pension payments. The plan's targeted
asset  allocation  is comprised of 75 percent  equities and 25 percent debt
securities.  Management  of the plan's  assets is  delegated  to the United
States Steel and Carnegie  Pension Fund. The fund manager has discretion to
move away from the target  allocations based upon the manager's judgment as
to current  confidence or concern for the capital markets.  Investments are
diversified by industry and type, limited by grade and maturity. The policy
prohibits  investments  in any  securities in the steel industry and allows
derivatives subject to strict guidelines.  Investment  performance and risk
is measured and monitored on an ongoing basis through quarterly  investment
meetings and periodic asset and liability studies.

                                    17

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE G - PENSIONS AND OTHER POSTRETIREMENT BENEFITS - CONTINUED

CASH FLOWS

Contributions
MPC  contributed  $60 million to its funded  pension plan in the six months
ended December 31, 2005 and expects to contribute  between $140 million and
$190 million in 2006. Cash contributions to be paid from the general assets
of MPC for both the unfunded pension and postretirement  benefit plans were
less than $1 million and $2 million in the six months  ended  December  31,
2005 and are  expected  to be  approximately  $1 million and $12 million in
2006.

Estimated future benefit payments
The  following  gross  benefit  payments,  which  reflect  expected  future
service, as appropriate, are expected to be paid:



                                                                       Pension Benefits                       Other Benefits (a)
                                                                       ----------------                       ------------------
                                                                                             (Millions)
                                                                                                         
                    July to December 2005                              $         26                            $         2
                    January to December 2006                                     80                                     12
                    January to December 2007                                     91                                     14
                    January to December 2008                                    105                                     16
                    January to December 2009                                    117                                     19
                    January to December 2010                                    126                                     21
                    Years 2011 - 2015                                           782                                    146


                    (a) Expected Medicare  reimbursements  for 2006 through
                        2015 total $13 million.

MPC also  contributes to several  defined  contribution  plans for eligible
employees.  Contributions  to these  plans  totaled  $15 million in the six
months ended June 30, 2005, $26 million in the year 2004 and $26 million in
the year 2003.


NOTE H - INCOME TAXES

The taxable income or loss resulting from the operations of MPC, except for
several  small  subsidiary  corporations,  is  ultimately  included  in the
federal income tax returns of MOC and Ashland. MPC is, however,  subject to
taxation in certain state, local and foreign jurisdictions.



                                      SIX MONTHS ENDED                                    Year Ended December 31
                                          6/30/2005                          2004                            2003
                               -------------------------------  -------------------------------  --------------------------------
                                CURRENT    DEFERRED    TOTAL     Current    Deferred    Total     Current   Deferred      Total
                               ----------- --------  --------   ----------  --------  ---------  ---------  ---------   ---------
                                                                           (Millions)
                                                                                            
PROVISIONS (CREDITS)FOR
    INCOME TAXES:
       State and local         $     14   $     21   $     35   $      3   $     (1)  $      2   $      3   $     --   $      3
       Foreign                        1         --          1         --         --         --          2         --          2
                               ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------  --------
              Total            $     15   $     21   $     36   $      3   $     (1)  $      2   $      5   $     --   $      5
                               =========  ========   =========  =========  =========  =========  =========  =========  ========


In the first  quarter of 2005,  the state of Kentucky  enacted  legislation
which  caused  limited  liability  companies  to be subject  to  Kentucky's
corporation income tax. The deferred tax provision for the six months ended
June 30, 2005 included $20 million  related to the effects of this Kentucky
income tax on deferred tax assets and liabilities as of January 1, 2005. In
addition,  the  current tax  provision  attributable  to  Kentucky  was $10
million for the six months ended June 30, 2005.

Deferred  tax  liabilities  at June 30, 2005 and  December  31, 2004 of $26
million and $5 million,  respectively,  principally  arise from differences
between  the book and tax  basis of  inventories  and  property,  plant and
equipment in certain state and local jurisdictions.

A net deferred tax asset of $1 million was separately  recorded at June 30,
2005 to recognize the deferred tax benefit of a state investment tax credit
carryforward  of $5 million  less a valuation  allowance  of $3 million and
deferred tax  liabilities  in that state of $1 million.  A net deferred tax
asset of $1  million  was  separately  recorded  at  December  31,  2004 to
recognize  the  deferred  tax  benefit  of a state  investment  tax  credit
carryforward  of $7 million  less a valuation  allowance  of $5 million and
deferred tax  liabilities  in that state of $1 million.  The investment tax
credits expire in 2012.


                                    18

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE H - INCOME TAXES - CONTINUED

Pretax income included $5 million,  $7 million and $5 million  attributable
to foreign  sources in the six months  ended June 30,  2005,  and the years
ended December 31, 2004 and 2003, respectively.


NOTE I - INVENTORIES



                                                                                                       JUNE 30       December 31
                                                                                                         2005           2004
                                                                                                     -----------     -----------
                                                                                                              (Millions)
                                                                                                              
INVENTORIES CONSIST OF THE FOLLOWING:
       Liquid hydrocarbons                                                                           $    1,133     $       644
       Refined products and merchandise                                                                   1,292           1,199
       Supplies and sundry items                                                                             90              90
                                                                                                     -----------    ------------
              Total (at cost)                                                                        $    2,515     $     1,933
                                                                                                     ===========    ============


The LIFO method used for  financial  accounting  purposes  accounted for 95
percent  and 93  percent  of total  inventory  value  at June 30,  2005 and
December 31, 2004,  respectively.  Current acquisition costs were estimated
to exceed the LIFO inventory  values at June 30, 2005 and December 31, 2004
by approximately $2,142 million and $1,270 million,  respectively.  Cost of
revenues was reduced and income from operations was increased by $3 million
in the six months ended June 30,  2005,  $4 million in 2004 and $10 million
in 2003 as a result of liquidations of LIFO inventories.


NOTE J - INVESTMENTS AND LONG-TERM RECEIVABLES


                                                                                                        JUNE 30      December 31
                                                                                                         2005           2004
                                                                                                     -----------     -----------
                                                                                                              (Millions)
                                                                                                               
Equity method investments:
       PTC                                                                                           $      375      $      372
       LOOP                                                                                                  72              60
       Centennial                                                                                            36              36
       Other                                                                                                 66              66
Receivables due after one year                                                                               22              15
Deposits of restricted cash                                                                                   9               4
                                                                                                     -----------     -----------
              Total                                                                                  $      580      $      553
                                                                                                     ===========     ===========


Summarized  financial  information of investees accounted for by the equity
method of accounting follows:



                                                                                       SIX MONTHS
                                                                                          ENDED        Year Ended December 31
                                                                                        6/30/2005       2004            2003
                                                                                      --------------- ----------     ----------
                                                                                                     (Millions)
                                                                                                            
Income data:
       Revenues and other income                                                      $    4,364     $    7,166      $    5,543
       Operating income                                                                      106            231             237
       Net income                                                                             70            165             163

                                                                                                       JUNE 30       December 31
                                                                                                         2005           2004
                                                                                                     -----------     -----------
                                                                                                              (Millions)
Balance sheet data:
       Current assets                                                                                $      472      $      333
       Noncurrent assets                                                                                  2,315           2,296
       Current liabilities                                                                                  580             418
       Noncurrent liabilities                                                                               924             936


MPC's carrying value of its equity method  investments is $73 million lower
than the underlying net assets of investees. This basis difference is being
accreted into income over the remaining  useful lives of the underlying net
assets.


                                    19


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE J - INVESTMENTS AND LONG-TERM RECEIVABLES - CONTINUED

Dividends  and  partnership   distributions  received  from  equity  method
investees  (excluding  distributions  that  represented a return of capital
previously  contributed)  were $20 million,  $80 million and $80 million in
the six months ended June 30, 2005,  and the years ended  December 31, 2004
and 2003, respectively.


NOTE K - PROPERTY, PLANT AND EQUIPMENT


                                                                                                       JUNE 30       December 31
                                                                                                         2005           2004
                                                                                                     -----------     -----------
                                                                                                              (Millions)
                                                                                                               
Refining                                                                                             $    4,443      $    4,230
Marketing                                                                                                 1,878           1,881
Transportation                                                                                            1,708           1,660
Other                                                                                                        59              64
                                                                                                     -----------     -----------
              Total                                                                                       8,088           7,835
Less accumulated depreciation and amortization                                                            3,228           3,054
                                                                                                     -----------     -----------
              Net                                                                                    $    4,860      $    4,781
                                                                                                     ===========     ===========


Property,  plant and equipment includes gross assets acquired under capital
leases of $49 million at both June 30, 2005 and December 31, 2004.  Related
amounts in accumulated  depreciation and amortization are $7 million and $6
million at June 30, 2005 and December 31, 2004, respectively.


NOTE L - GOODWILL

The  carrying  amount of  goodwill  was $21 million as of June 30, 2005 and
December 31, 2004.  MPC tests for  impairment in the fourth quarter of each
year.  No  impairment  in the carrying  value was  identified in the fourth
quarter of 2004,  and no indicators of  impairment  were  identified in the
subsequent periods.


NOTE M - INTANGIBLE ASSETS



                                                                      Gross Carrying          Accumulated         Net Carrying
                                                                          Amount             Amortization            Amount
                                                                     -----------------    ------------------    ----------------
                                                                                              (Millions)
                                                                                                       
INTANGIBLE ASSETS AS OF JUNE 30, 2005, ARE AS FOLLOWS:
       Amortized intangible assets:
              Branding agreements                                    $             54     $              21     $            33
              Other                                                                12                     1                  11
                                                                     -----------------    ------------------    ----------------
                    Total                                            $             66     $              22     $            44
                                                                     =================    ==================    ================

       Unamortized intangible assets:
              Unrecognized prior service costs and other             $             24     $              --     $            24
                                                                     =================    ==================    ================


INTANGIBLE ASSETS AS OF DECEMBER 31, 2004, ARE AS FOLLOWS:
       Amortized intangible assets:
              Branding agreements                                    $             53     $              19     $            34
              Other                                                                10                    --                  10
                                                                     -----------------    ------------------    ----------------
                    Total                                            $             63     $              19     $            44
                                                                     =================    ==================    ================

       Unamortized intangible assets:
              Unrecognized prior service costs and other             $             25     $              --     $            25
                                                                     =================    ==================    ================



                                    20

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE M - INTANGIBLE ASSETS - CONTINUED

Amortization  expense  related to  intangibles  during the six months ended
June 30, 2005 and the years  ended  December  31, 2004 and 2003  totaled $4
million, $7 million and $6 million,  respectively.  Estimated  amortization
expense for the six months ended December 31, 2005 is $4 million. Estimated
amortization  expense for the years 2006-2010 is $8 million, $7 million, $6
million, $5 million and $5 million, respectively.


NOTE N - LONG-TERM DEBT



                                                                                                       JUNE 30       December 31
                                                                                                         2005           2004
                                                                                                     -----------     -----------
                                                                                                             (Millions)

                                                                                                               
Capital lease obligations due July 1, 2005 - 2018                                                    $       42      $       44
Detroit refinery project loan - Note E                                                                      221             122
Revolving credit facility due 2009 (a)                                                                       --              --
                                                                                                     -----------     -----------
              Total (b)                                                                                     263             166
Amounts due within one year                                                                                 (18)             (2)
                                                                                                     -----------     -----------
              Long-term debt due after one year                                                      $      245      $      164
                                                                                                     ===========     ===========



(a)  MPC has a $500  million  five-year  revolving  credit  facility  which
     terminates in May 2009. This facility  requires a representation at an
     initial  borrowing  that  there has been no  change in the  borrower's
     consolidated financial position or operations,  considered as a whole,
     that would materially and adversely affect such borrower's  ability to
     perform its obligations under the revolving credit facility.  Interest
     on this facility is based on defined  short-term market rates.  During
     the term of the agreement, MPC is obligated to pay a variable facility
     fee on total  commitments,  which at June 30, 2005, was 0.125 percent.
     During the six months ended June 30, 2005, MPC had no borrowings under
     this credit facility.
 (b) Required  payments of long-term debt for the six months ended December
     31, 2006 are $1 million.  Required  payments of long-term debt for the
     years 2007-2010 are $3 million, $3 million, $3 million and $3 million,
     respectively.  In addition, repayments of the Detroit refinery project
     loan,  expected to be $16  million in the period July 1, 2005  through
     June 30, 2006, will be funded solely from available  Detroit  refinery
     cash flows.


NOTE O - ASSET RETIREMENT OBLIGATIONS

Changes in asset retirement obligations were:



                                                                                                SIX MONTHS
                                                                                                   ENDED            Year Ended
                                                                                                6/30/2005           12/31/2004
                                                                                              ------------        --------------
                                                                                                          (Millions)

                                                                                                            
Asset retirement obligations as of beginning of period                                        $          4        $          1
       Liabilities incurred                                                                             --                   3
       Liabilities settled                                                                              (1)                 --
                                                                                              -------------       -------------
Asset retirement obligations as of end of period                                              $          3        $          4
                                                                                              =============       =============




                                    21

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE P - SUPPLEMENTAL CASH FLOW INFORMATION


                                                                                       SIX MONTHS           Year Ended
                                                                                          ENDED             December 31
                                                                                        6/30/2005        2004            2003
                                                                                      ------------   ------------    ------------
                                                                                                       (Millions)
                                                                                                            
NET CASH PROVIDED FROM OPERATING ACTIVITIES INCLUDED:
       Interest and other financing costs paid (net of amounts capitalized)           $       --     $        4      $        2
       Income taxes paid to taxing authorities                                                13              3               3
NONCASH INVESTING AND FINANCING ACTIVITIES:
       Asset retirement costs capitalized                                                     --              3              --
       Net assets contributed to joint ventures                                               --              3              42
       Receivables transferred in the Partial Redemption                                     911             --              --
       Member capital contributions                                                            5             18              14
       Capital lease obligation - asset acquired                                              --             --              41
       Liabilities assumed in connection with capital expenditures                            --              1               1



NOTE Q - LEASES

MPC leases a wide  variety of  facilities  and  equipment  under  operating
leases,  including  land and  building  space,  office  equipment,  storage
facilities and  transportation  equipment.  Most  long-term  leases include
renewal options and, in certain leases,  purchase  options.  Future minimum
commitments for capital lease  obligations and operating lease  obligations
having remaining noncancelable lease terms in excess of one year as of June
30, 2005 are as follows:



                                                                       Capital          Operating
                                                                        Lease             Lease
                                                                     Obligations      Obligations
                                                                     -----------      -----------
                                                                                (Millions)

                                                                                
July to December 2005                                                $        3       $       42
January to December 2006                                                      5               67
January to December 2007                                                      5               31
January to December 2008                                                      5               24
January to December 2009                                                      5               20
January to December 2010                                                      5               11
Later years                                                                  35               26
                                                                     -----------      -----------

       Total minimum lease payments                                  $       63       $      221
                                                                                      ===========

Less imputed interest costs                                                  21
                                                                     -----------
       Present value of net minimum lease payments
       included in long-term debt                                    $       42
                                                                     ===========




                                                                                       SIX MONTHS           Year Ended
                                                                                          ENDED             December 31
                                                                                        6/30/2005        2004            2003
                                                                                      ------------   ------------    ------------
                                                                                                       (Millions)
                                                                                                            
OPERATING LEASE RENTAL EXPENSE WAS:
       Minimum rental                                                                 $       44     $       85      $       85
       Contingent rental                                                                      10             15              12
                                                                                      -----------    -----------     -----------
              Total rental expense                                                    $       54     $      100      $       97
                                                                                      ===========    ===========     ===========


NOTE R - DERIVATIVE INSTRUMENTS

The  following  table sets forth  quantitative  information  by category of
derivative  instruments  at June 30,  2005 and  December  31,  2004.  These
amounts are reported on a gross basis by individual derivative  instrument.
MPC did not have any foreign  currency  contracts in place at June 30, 2005
or December 31, 2004.

                                    22

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE R - DERIVATIVE INSTRUMENTS - CONTINUED



                                                                            JUNE 30, 2005                 December 31, 2004
                                                                  ------------------------------      -----------------------------
                                                                  ASSETS(a)     (LIABILITIES)(a)      Assets  (a)  (Liabilities)(a)
                                                                  ----------    ----------------      ------------  ---------------
                                                                                              (Millions)
                                                                                                         
COMMODITY INSTRUMENTS, NON-HEDGE DESIGNATION:
       Exchange-traded commodity futures                          $      412      $     (516)          $      216    $     (206)
       Exchange-traded commodity options                                  92             (89)                  79           (65)
       Over-the-counter ("OTC") commodity swaps                           26             (14)                  48           (30)
       OTC commodity options                                               7             (17)                   5            (4)

NONTRADITIONAL INSTRUMENTS (b)                                            89             (76)                  86           (91)


(a)  The fair value and carrying  value of derivative  instruments  are the
     same.  The fair value amounts for OTC positions are  determined  using
     option-pricing   models  or  dealer   quotes.   The  fair   values  of
     exchange-traded  positions  are based on market  quotes  derived  from
     major exchanges. MPC's consolidated balance sheet is reported on a net
     asset/(liability)  basis by brokerage firm, as permitted by the master
     netting agreements.
(b)  Certain physical commodity  contracts are classified as nontraditional
     derivative  instruments  because  certain  volumes  covered  by  these
     contracts  are  physically  netted at particular  delivery  locations.
     Additionally,  other  physical  contracts that involve flash title are
     accounted for as nontraditional derivative instruments.

MPC recorded a net derivative  loss of $173 million in the six months ended
June 30, 2005, with a derivative loss of $107 million  recorded in revenue,
a  derivative  loss of $32  million  recorded  in cost  of  revenues  and a
derivative  loss of $34 million  recorded  in other  income.  In 2004,  MPC
recorded a net derivative  loss of $264 million,  with a derivative loss of
$360 million recorded in cost of revenues, a derivative gain of $88 million
recorded in revenue and a derivative  gain of $8 million  recorded in other
income. In 2003, MPC recorded a net derivative loss of $162 million, with a
derivative loss of $133 million recorded in cost of revenues,  a derivative
loss of $25 million recorded in revenue and a derivative loss of $4 million
recorded in other income.


NOTE S - FAIR VALUE OF FINANCIAL INSTRUMENTS

The carrying  value of most  financial  instruments  is based on historical
costs.  The  carrying  values  of cash and cash  equivalents,  receivables,
payables,  long-term  receivables and long-term debt approximate their fair
value.

MPC's unrecognized  financial  instruments consist of financial  guarantees
and  commitments  to extend  credit.  For  details  relating  to  financial
guarantees, see Note T.


NOTE T - CONTINGENCIES AND COMMITMENTS

MPC is the subject of, or party to, a number of pending or threatened legal
actions,  contingencies  and  commitments  involving  a variety of matters,
including  laws and  regulations  relating to the  environment.  Certain of
these  matters  are  discussed  below.  The  ultimate  resolution  of these
contingencies could, individually or in the aggregate, be material to MPC's
consolidated  financial statements.  However,  management believes that MPC
will remain a viable and competitive  enterprise even though it is possible
that these contingencies could be resolved unfavorably.

ENVIRONMENTAL MATTERS - MPC is subject to federal, state, local and foreign
laws and  regulations  relating to the  environment.  These laws  generally
provide for control of pollutants released into the environment and require
responsible  parties to undertake  remediation of hazardous  waste disposal
sites.  Penalties  may be imposed for  noncompliance.  Marathon and Ashland
have retained the  liabilities,  subject to certain  thresholds,  for costs
associated  with  remediating  properties  conveyed  to MPC for  conditions
existing  prior to  January  1,  1998.  The  costs  associated  with  these
thresholds are not expected to be material to the MPC financial statements.
At June 30, 2005 and December  31,  2004,  MPC's  accrued  liabilities  for
remediation  totaled $29 million and $26 million,  respectively.  It is not
presently possible to estimate the ultimate amount of all remediation costs
that might be incurred or the  penalties  that may be imposed.  Receivables
for  recoverable  costs  from  certain  states,  under  programs  to assist
companies in cleanup efforts related to underground storage tanks at retail
marketing  outlets,  were $15  million and $11 million at June 30, 2005 and
December 31, 2004, respectively.


                                    23

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE T - CONTINGENCIES AND COMMITMENTS - CONTINUED

On May  11,  2001,  MPC  entered  into  a  consent  decree  with  the  U.S.
Environmental  Protection  Agency  which  commits  it to  complete  certain
agreed-upon  environmental  programs  over an eight-year  period  primarily
aimed at reducing air emissions at its seven refineries. The court approved
this consent decree on August 28, 2001. The total one-time expenditures for
these  environmental  projects  are  approximately  $420  million  over the
eight-year period,  with about $250 million incurred through June 30, 2005.
In  addition,  MPC has  nearly  completed  certain  agreed on  supplemental
environmental  projects as part of this settlement of an enforcement action
for alleged Clean Air Act violations, at a cost of $9 million. MPC believes
that  this  settlement  will  provide  MPC with  increased  permitting  and
operating flexibility while achieving significant emission reductions.

MPC is a  defendant  along with many other  refining  companies  in over 40
cases  in  11  states   alleging  methyl   tertiary-butyl   ether  ("MTBE")
contamination in groundwater.  All of these cases have been consolidated in
a  multi-district  litigation  in the  Southern  District  of New  York for
preliminary proceedings.  The judge in this multi-district litigation ruled
on April 20, 2005 that some form of market  share  liability  would  apply.
Market  share  liability  enables  a  plaintiff  to sue  manufacturers  who
represent  a  substantial  share of a market for a  particular  product and
shift the burden of  identification of who actually made the product to the
defendants, effectively forcing a defendant to show that it did not produce
the MTBE which allegedly caused the damage. The judge further allowed cases
to go forward in New York and 11 other states,  based upon varying theories
of collective  liability,  and predicted  that a new theory of market share
liability  would be  recognized  in  Connecticut,  Indiana and Kansas.  The
plaintiffs  generally are water providers or  governmental  authorities and
they allege that refiners, manufacturers and sellers of gasoline containing
MTBE are liable for  manufacturing a defective  product and that owners and
operators of retail  gasoline sites have allowed MTBE to be discharged into
the  groundwater.  Several of these lawsuits allege  contamination  that is
outside of MPC's  marketing area. A few of the cases seek approval as class
actions.  Many of the cases seek punitive damages or treble damages under a
variety  of  statutes  and  theories.  MPC  stopped  producing  MTBE at its
refineries in October 2002. The potential  impact of these recent cases and
future  potential  similar cases is uncertain.  MPC will defend these cases
vigorously.

GUARANTEES - MPC has issued the following guarantees:


                                                                                                               MAXIMUM POTENTIAL
                                                                                                             UNDISCOUNTED PAYMENTS
                                                                           Term                               AS OF JUNE 30, 2005
                                                                           ----                              ---------------------
                                                                                                                  (MILLIONS)
                                                                                                          
Indebtedness of equity method investees:
      LOCAP (a)                                                Perpetual-Loan Balance Varies                    $      23
      LOOP (a)                                                          2005 - 2024                                   160
      Centennial (b)                                                    2007 - 2024                                    75

Other:
      Centennial catastrophic event (c)                                 Indefinite                                     50
      Mobile transportation equipment leases (d)                        2005 - 2009                                     5
      Terminal asset sale (e)                                           Indefinite                                      5


(a)  MPC holds interests in an offshore crude oil unloading port, LOOP, and
     a crude oil pipeline system,  LOCAP.  Both LOOP and LOCAP have secured
     various project financings with throughput and deficiency  agreements.
     Under  the  agreements,  MPC  is  required  to  advance  funds  if the
     investees are unable to service debt. Any such advances are considered
     prepayments  of  future  transportation  charges.  The  terms  of  the
     agreements  vary but tend to follow the terms of the underlying  debt.
     Assuming nonpayment by the investees,  the maximum potential amount of
     future  payments under the guarantees is estimated to be $183 million.
     Included in these amounts are a LOOP revolving  credit facility of $25
     million and a LOCAP  revolving  credit  facility of $23  million.  The
     undrawn portion of the revolving credit facilities is $35 million.
(b)  MPC holds an interest in a refined products pipeline,  Centennial, and
     has guaranteed the repayment of Centennial's outstanding balance under
     a  Master  Shelf  Agreement,  which  expires  in  2024,  and a  Credit
     Agreement,  which expires in 2007.  The  guarantees  arose in order to
     obtain  adequate  financing.  Prior to  expiration of the Master Shelf
     Agreement,  MPC could be relinquished  from  responsibility  under the
     guarantee   should   Centennial  meet  certain   financial  tests.  If
     Centennial defaults on its outstanding  balance, the estimated maximum
     potential amount of future payments is $75 million.
(c)  The agreement between Centennial and its members allows each member to
     contribute cash in lieu of Centennial  procuring separate insurance in
     the event of third-party  liability arising from a catastrophic event.
     There is an  indefinite  term for the  agreement and each member is to
     contribute  cash in  proportion  to its  ownership  interest,  up to a
     maximum amount of $50 million.
(d)  These leases contain terminal rental adjustment  clauses which provide
     that MPC will  indemnify  the lessor to the extent  that the  proceeds
     from the sale of the asset at the end of the lease  fall  short of the
     specified minimum percent of the fair market value of the asset at the
     time of sale.


                                    24

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE T - CONTINGENCIES AND COMMITMENTS - CONTINUED

(e)  MPC  entered  into  certain  performance  and general  guarantees  and
     environmental and general indemnifications in connection with the 2004
     sale of a  refined  products  terminal.  The  terms  vary from 2006 to
     indefinite,  and the maximum potential amount of future payments under
     the guarantees and indemnifications is estimated to be $5 million.

CONTRACT  COMMITMENTS  - At June 30,  2005 and  December  31,  2004,  MPC's
contract commitments to acquire property,  plant and equipment totaled $257
million and $268 million, respectively.

In May 2001, MPC entered into a Transportation Agreement with Centennial in
which MPC guarantees to ship certain  volumes on the  Centennial  system or
make deficiency  payments for any volume shortfall.  Any deficiency payment
made by MPC  will be  treated  as a  prepayment  of  future  transportation
charges.  In the six  months  ended  June 30,  2005,  and the  years  ended
December 31, 2004 and 2003, MPC made  deficiency  payments to Centennial of
$1 million, $4 million and $4 million, respectively.

PUT/CALL AGREEMENT - As part of the formation of PTC, MPC and Pilot entered
into a  Put/Call  and  Registration  Rights  Agreement  ("Agreement").  The
Agreement  provides that any time after September 1, 2008,  Pilot will have
the right to sell its  interest  in PTC to MPC for an amount of cash and/or
MOC, MPC or Ashland  equity  securities  equal to the product of 90 percent
(95 percent if paid in  securities)  of the fair market value of PTC at the
time  multiplied by Pilot's  percentage  interest in PTC. At any time after
September 1, 2011,  under  certain  conditions,  MPC will have the right to
purchase  Pilot's  interest in PTC for an amount of cash and/or MOC, MPC or
Ashland equity  securities equal to the product of 105 percent (110 percent
if  paid  in  securities)  of the  fair  market  value  of PTC at the  time
multiplied by Pilot's percentage interest in PTC. Under the Agreement,  MPC
would determine the form of  consideration  to be paid upon exercise of the
rights.


NOTE U - ACCOUNTING STANDARDS NOT ADOPTED AT JUNE 30, 2005

In February  2006,  the FASB issued SFAS No. 155,  "Accounting  for Certain
Hybrid Financial  Instruments - an amendment of FASB Statements No. 133 and
140." SFAS No. 155 simplifies  the accounting for certain hybrid  financial
instruments,  eliminates  the FASB's  interim  guidance which provides that
beneficial interests in securitized financial assets are not subject to the
provisions of SFAS No. 133,  "Accounting  for  Derivative  Instruments  and
Hedging   Activities,"  and  eliminates  the  restriction  on  the  passive
derivative  instruments that a qualifying  special-purpose entity may hold.
SFAS No. 155 is effective for all financial  instruments acquired or issued
after the  beginning  of an entity's  first  fiscal year that begins  after
September  15, 2006.  MPC is  currently  studying  the  provisions  of this
statement to determine the impact on its consolidated financial statements.

In September  2005, the FASB ratified the consensus  reached by the EITF on
Issue No. 04-13,  "Accounting for Purchases and Sales of Inventory with the
Same  Counterparty."  The  issue  defines  when a  purchase  and a sale  of
inventory with the same party that operates in the same line of business is
recorded  at fair  value or  considered  a single  nonmonetary  transaction
subject to the fair value exception of Accounting  Principles Board ("APB")
Opinion No. 29. The  purchase  and sale  transactions  may be pursuant to a
single contractual arrangement or separate contractual arrangements and the
inventory  purchased  or  sold  may  be  in  the  form  of  raw  materials,
work-in-process,  or finished goods. In general,  two or more  transactions
with  the  same  party  are  treated  as one if they  are  entered  into in
contemplation of each other.  The rules apply to new  arrangements  entered
into in reporting  periods  beginning  after March 15, 2006. The accounting
for certain of the  transactions  that MPC  considers as matching  buy/sell
transactions  will  be  affected  by this  consensus  and  therefore,  upon
adoption,  these  transactions will no longer be recorded on a gross basis.
MPC is currently studying the provisions of this consensus to determine the
impact on its consolidated financial statements;  however,  management does
not believe any impact on net income  would be  material.  There will be no
impact on cash flows from operations as a result of adoption.

In May 2005,  the FASB issued SFAS No. 154,  "Accounting  Changes and Error
Corrections  - A Replacement  of APB Opinion No. 20 and FASB  Statement No.
3." SFAS No. 154 requires  companies to recognize (1) voluntary  changes in
accounting   principle  and  (2)  changes  required  by  a  new  accounting
pronouncement,  when the pronouncement does not include specific transition
provisions,  retrospectively to prior periods' financial statements, unless
it is impracticable to determine either the period-specific  effects or the
cumulative  effect of the change.  SFAS No. 154 is effective for accounting
changes and  correction  of errors  made in fiscal  years  beginning  after
December 15, 2005.

In  March  2005,  the FASB  issued  FASB  Interpretation  ("FIN")  No.  47,
"Accounting   for   Conditional   Asset   Retirement   Obligations   -   an
interpretation  of FASB Statement No. 143." This  interpretation  clarifies
that an entity is required to recognize a liability for a legal  obligation
to perform asset  retirement  activities when the retirement is conditional
on a future event if the liability's fair value



                                    25



NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - CONTINUED


NOTE U - ACCOUNTING STANDARDS NOT ADOPTED AT JUNE 30, 2005 - CONTINUED

can be  reasonably  estimated.  If the  liability's  fair  value  cannot be
reasonably  estimated,  then the entity must disclose (1) a description  of
the  obligation,  (2) the fact  that a  liability  has not been  recognized
because the fair value cannot be reasonably estimated,  and (3) the reasons
why the  fair  value  cannot  be  reasonably  estimated.  FIN  No.  47 also
clarifies  when an entity would have  sufficient  information to reasonably
estimate the fair value of an asset retirement obligation.  MPC adopted FIN
No. 47 as of December 31, 2005. A charge of $43 million related to adopting
FIN No. 47 was recognized as a cumulative  effect of a change in accounting
principle in the six months ended December 31, 2005.

In December 2004,  the FASB issued SFAS No. 153,  "Exchanges of Nonmonetary
Assets - an amendment of APB Opinion No. 29." This amendment eliminates the
APB Opinion No. 29  exception  for fair value  recognition  of  nonmonetary
exchanges  of similar  productive  assets and replaces it with an exception
for exchanges of nonmonetary assets that do not have commercial  substance.
MPC adopted SFAS No. 153 on a prospective basis as of July 1, 2005.

In December 2004, the FASB issued SFAS No. 123 (Revised 2004), "Share-Based
Payment,"  ("SFAS No.  123(R)") as a revision of SFAS No. 123,  "Accounting
for Stock-Based  Compensation." This statement requires entities to measure
the cost of employee  services  received in exchange for an award of equity
instruments  based on the fair value of the award on the grant  date.  That
cost  will be  recognized  over the  period  during  which an  employee  is
required to provide service in exchange for the award,  usually the vesting
period.  In addition,  awards  classified as liabilities will be remeasured
each reporting period. MPC adopted the fair value method under SFAS No. 123
for  grants  made,  modified  or  settled  on or  after  January  1,  2003.
Accordingly,  MPC does not expect the adoption of SFAS No. 123(R) to have a
material  effect  on its  consolidated  results  of  operations,  financial
position or cash flows.  The  statement  provided for an effective  date of
July 1, 2005, for MPC. However,  in April 2005, the Securities and Exchange
Commission  adopted a rule that, for MPC, deferred the effective date until
January 1, 2006. MPC adopted the provisions of this statement on January 1,
2006.

In November  2004,  the FASB issued  SFAS No.  151,  "Inventory  Costs - an
amendment of ARB No. 43,  Chapter 4." This  statement  requires  that items
such as idle facility  expense,  excessive  spoilage,  double freight,  and
re-handling costs be recognized as a current-period charge. MPC is required
to  implement  this  statement in the first  quarter of 2006.  MPC does not
expect  the  adoption  of SFAS No.  151 to have a  material  effect  on its
consolidated results of operations, financial position or cash flows.

                                    26