<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM TESORO
PETROLEUM CORPORATION'S FINANCIAL STATEMENTS AS OF AND FOR THE SIX MONTH PERIOD
ENDED JUNE 30, 2000 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               JUN-30-2000
<CASH>                                           8,600
<SECURITIES>                                         0
<RECEIVABLES>                                  322,000
<ALLOWANCES>                                     1,700
<INVENTORY>                                    282,300
<CURRENT-ASSETS>                               619,200
<PP&E>                                         996,300
<DEPRECIATION>                                 262,700
<TOTAL-ASSETS>                               1,483,900
<CURRENT-LIABILITIES>                          351,300
<BONDS>                                        345,300
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                    165,000
<COMMON>                                         5,400
<OTHER-SE>                                     455,300
<TOTAL-LIABILITY-AND-EQUITY>                 1,483,900
<SALES>                                      2,272,300
<TOTAL-REVENUES>                             2,273,500
<CGS>                                        2,177,200
<TOTAL-COSTS>                                2,177,200
<OTHER-EXPENSES>                                21,000
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              17,900
<INCOME-PRETAX>                                 39,400
<INCOME-TAX>                                    15,500
<INCOME-CONTINUING>                             23,900
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    23,900
<EPS-BASIC>                                       0.57
<EPS-DILUTED>                                     0.56