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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 18, 2002



                          TESORO PETROLEUM CORPORATION
             (Exact name of registrant as specified in its charter)



<Table>
                                                                    
               DELAWARE                              1-3473                          95-0862768
     (State or other jurisdiction           (Commission File Number)      (IRS Employer Identification No.)
           of incorporation)

                        300 CONCORD PLAZA DRIVE                                      78216-6999
                          SAN ANTONIO, TEXAS                                         (Zip Code)
               (Address of principal executive offices)
</Table>




       Registrant's telephone number, including area code: (210) 828-8484


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ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

         (a)      Financial statements of businesses acquired.

                  Not applicable.

         (b)      Pro forma financial information.

                  Not applicable.

         (c)      Exhibits.

                  99.1     Presentation Data.

ITEM  9.  REGULATION FD DISCLOSURE

         Tesoro is furnishing herewith certain data being presented by certain
of its executive officers commencing at 7:30 a.m. Eastern Time on June 18, 2002.
The data is filed as Exhibit 99.1 to this Current Report on Form 8-K and is
incorporated herein by reference.

         The information presented may contain forward-looking statements and
certain assumptions upon which such forward-looking statements are in part
based. Numerous important factors, including those factors identified as Risk
Factors and Investment Considerations in Tesoro's Annual Report on Form 10-K and
other of the Company's filings with the Securities and Exchange Commission, and
the fact that the assumptions set forth in the presentation data could prove
incorrect, could cause actual results to differ materially from those contained
in such forward-looking statements.


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                                   SIGNATURES


         Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the Registrant has duly caused this report to be signed on its behalf
by the undersigned hereunto duly authorized.


Date:    June 17, 2002


                                         TESORO PETROLEUM CORPORATION




                                         By:      /s/ Gregory A. Wright
                                              ---------------------------------
                                                      Gregory A. Wright
                                              Senior Vice President and Chief
                                                     Financial Officer


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                                INDEX TO EXHIBITS

<Table>
<Caption>
EXHIBIT NUMBER                           DESCRIPTION
                                     
     99.1                               Presentation Data.
</Table>


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