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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to section 13 or 15 (d) of the Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported): June 6, 2002

                                PREMCOR USA INC.
             (Exact name of registrant as specified in its charter)


                         Commission file number: 1-13514


                 Delaware                                    43-1495734
       (State or other jurisdiction                       (I.R.S. Employer
     of incorporation or organization)                   Identification No.)


          1700 East Putnam Avenue
                 Suite 500                                     06870
        Old Greenwich, Connecticut                           (Zip Code)
 (Address of principal executive offices)


       Registrant's telephone number, including area code: (203) 698-7500


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Item 2.    Acquisition or Disposition of Assets

         On June 6, 2002, Premcor USA Inc.'s ("Premcor USA") wholly owned
subsidiary, The Premcor Refining Group Inc. ("PRG"), and Sabine River Holding
Corp. ("Sabine") completed a series of transactions ("the restructuring") that
resulted in Sabine and its subsidiaries becoming wholly owned subsidiaries of
PRG. Sabine, through its principal operating subsidiary, Port Arthur Coker
Company L.P. ("PACC"), owns and operates a heavy oil processing facility, which
is operated in conjunction with PRG's Port Arthur, Texas refinery. Prior to the
restructuring, Sabine was 90% owned by Premcor Inc. and 10% owned by Occidental
Petroleum Corporation. Premcor USA is a wholly owned subsidiary of Premcor Inc.

         The restructuring was permitted by the successful consent solicitation
of the bondholders of Sabine's Port Arthur Finance Corp. 12 1/2% senior notes
due 2009. The restructuring was accomplished according to the following steps,
among others:

...    Premcor Inc. contributed $225.6 million in proceeds from its initial public
     offering of common stock to Sabine. Sabine used the proceeds from the
     equity contribution, plus cash on hand to prepay $221.4 million of its
     senior secured bank loan and to pay a dividend of $141.4 million to Premcor
     Inc.;

...    Commitments under Sabine's senior secured bank loan, working capital
     facility, and certain insurance policies were terminated and related
     guarantees were released;

...    PRG's existing working capital facility was amended and restated to, among
     other things, permit letters of credit to be issued on behalf of Sabine;

...    Occidental Petroleum Corporation exchanged its 10% interest in Sabine for
     1,363,636 newly issued shares of Premcor Inc. common stock;

...    Premcor Inc. contributed its 100% ownership interest in Sabine to Premcor
     USA, which in turn contributed its 100% ownership interest to PRG; and

...    PRG fully and unconditionally guaranteed, on a senior unsecured basis, the
     payment obligations under the Port Arthur Finance Corp. 12 1/2% senior
     notes due 2009. The guarantee was issued in a private placement made in
     reliance on an exemption from the registration requirements of the
     Securities Act. PRG and Sabine have agreed to file a registration statement
     under the Securities Act to register the notes and the PRG guarantee, not
     later than 120 days from June 6, 2002.

                                       2



Item 7.    Financial Statements, Pro Forma Financial Information and Exhibits

    (a)    Financial Statements of Business Acquired

           The audited consolidated balance sheets of Sabine for the years ended
December 31, 2001 and 2000 and the audited consolidated statements of operations
of Sabine for the years ended December 31, 2001, 2000, and 1999 are incorporated
by reference to Sabine's Annual Report on Form 10-K for the year ended December
31, 2001, and the unaudited consolidated financial statements of Sabine for the
three months ended March 31, 2002 are incorporated by reference to Sabine's
Quarterly Report on Form 10-Q for the quarter ended March 31, 2002.

    (b)    Pro forma Financial Information

           The unaudited pro forma financial statements reflecting the
restructuring and certain other significant transactions include the unaudited
pro forma combined condensed balance sheet as of March 31, 2002 and the
unaudited pro forma combined condensed statements of operations for the quarter
ended March 31, 2002 and the years ended December 31, 2001, 2000, and 1999.
These statements are filed as Exhibit 99.1 to this Current Report on Form 8-K
and are incorporated herein by reference.

    (c)    Exhibits

         Exhibit No.                    Description
           3.1     Amended and Restated Certificate of Incorporation of Sabine
                   River Holding Corp. ("Sabine") dated June 6, 2002
                   (Incorporated by reference to Exhibit 3.1 filed with The
                   Premcor Refining Group Inc.'s ("PRG") Current Report on Form
                   8-K dated June 6, 2002 (Registration No 1-11392))

           3.2     Amended and Restated By-Laws of Sabine dated June 6, 2002
                   (Incorporated by reference to Exhibit 3.2 filed with PRG's
                   Current Report on Form 8-K dated June 6, 2002 (Registration
                   No 1-11392))

           3.3     Amended and Restated Certificate of Incorporation of Neches
                   River Holding Corp. ("Neches") dated June 6, 2002
                   (Incorporated by reference to Exhibit 3.3 filed with PRG's
                   Current Report on Form 8-K dated June 6, 2002 (Registration
                   No 1-11392))

           3.4     Amended and Restated By-Laws of Neches dated June 6, 2002
                   (Incorporated by reference to Exhibit 3.4 filed with PRG's
                   Current Report on Form 8-K dated June 6, 2002 (Registration
                   No 1-11392))

           3.5     Amended and Restated Certificate of Incorporation of Port
                   Arthur Finance Corp. ("PAFC") dated June 6, 2002
                   (Incorporated by reference to Exhibit 3.5 filed with PRG's
                   Current Report on Form 8-K dated June 6, 2002 (Registration
                   No 1-11392))

           3.6     Amended and Restated By-Laws of PAFC dated June 6, 2002
                   (Incorporated by reference to Exhibit 3.6 filed with
                   PRG's Current Report on Form 8-K dated June 6, 2002
                   (Registration No 1-11392))

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          Exhibit No.                     Description
              3.7       Second Amended and Restated Limited Partnership
                        Agreement for Port Arthur Coker Company L.P.
                        ("PACC") dated as of June 6, 2002 (Incorporated
                        by reference to Exhibit 3.7 filed with PRG's
                        Current Report on Form 8-K dated June 6, 2002
                        (Registration No 1-11392))

              4.1       First Supplemental Indenture, dated as of June 6,
                        2002, among The Premcor Refining Group Inc.
                        ("PRG"), Sabine, Neches, PACC, PAFC, Deutsche
                        Bank Trust Company Americas, as Collateral
                        Trustee, and HSBC Bank USA, as Capital Markets
                        Trustee (Incorporated by reference to Exhibit
                        4.1 filed with PRG's Current Report on Form 8-K
                        dated June 6, 2002 (Registration No 1-11392))

              4.2       Amended and Restated Common Security Agreement,
                        dated as of June 6, 2002, among Sabine, PRG,
                        PAFC, PACC, Neches, Deutsche Bank Trust Company
                        Americas, as Collateral Trustee and Depositary
                        Bank, and HSBC Bank USA, as Capital Markets
                        Trustee (Incorporated by reference to Exhibit
                        4.2 filed with PRG's Current Report on Form 8-K
                        dated June 6, 2002 (Registration No 1-11392))

              4.3       Registration Rights Agreement, dated as of June 6,
                        2002, among PAFC, Sabine, PRG, PACC, and Neches
                        (Incorporated by reference to Exhibit 4.3 filed
                        with PRG's Current Report on Form 8-K dated June
                        6, 2002 (Registration No 1-11392))

              4.4       Amended and Restated Transfer Restrictions
                        Agreement, dated as of June 6, 2002, among PAFC,
                        PACC, Premcor Inc., Sabine, Neches, Deutsche
                        Bank Trust Company Americas, as Collateral
                        Trustee, and HSBC Bank USA, as Capital Markets
                        Trustee (Incorporated by reference to Exhibit
                        4.4 filed with PRG's Current Report on Form 8-K
                        dated June 6, 2002 (Registration No 1-11392))

              4.5       Equity Contribution Agreement, dated as of June 6,
                        2002, among Premcor Inc., Premcor USA Inc., and
                        PRG (Incorporated by reference to Exhibit 4.5
                        filed with PRG's Current Report on Form 8-K
                        dated June 6, 2002 (Registration No 1-11392))

              10.1      Second Amended and Restated Credit Agreement,
                        dated as of May 29, 2002, among PRG, Deutsche
                        Bank Trust Company Americas, as Administrative
                        Agent and Collateral Agent, TD Securities (USA)
                        Inc., as Syndication Agent, Fleet National Bank,
                        as Documentation Agent, and other financial
                        institutions party hereto (Incorporated by
                        reference to Exhibit 10.1 filed with PRG's
                        Current Report on Form 8-K dated June 6, 2002
                        (Registration No 1-11392))

              99.1      Unaudited Pro Forma Combined Condensed Balance
                        Sheet as of March 31, 2002, and Unaudited Pro
                        Forma Combined Condensed Statements of
                        Operations for the quarter ended March 31, 2002
                        and the years ended December 31, 2001, 2000, and
                        1999 (filed herewith)

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SIGNATURE

     Pursuant to the requirements 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.

                                                  PREMCOR USA INC.
                                                    (Registrant)




                                     /s/  Dennis R. Eichholz
                                     -------------------------------------------
                                     Dennis R. Eichholz
                                     Controller (principal
                                      accounting officer and
                                      duly authorized officer)

June 20, 2002

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                               Exhibit Index

          Exhibit No.                    Description

             99.1       Unaudited Pro Forma Combined Condensed Balance
                        Sheet as of March 31, 2002, and Unaudited Pro
                        Forma Combined Condensed Statements of
                        Operations for the quarter ended March 31, 2002
                        and the years ended December 31, 2001, 2000, and
                        1999