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

<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                          24,500
<SECURITIES>                                         0
<RECEIVABLES>                                  351,300
<ALLOWANCES>                                     2,200
<INVENTORY>                                    275,300
<CURRENT-ASSETS>                               657,200
<PP&E>                                       1,014,800
<DEPRECIATION>                                 273,000
<TOTAL-ASSETS>                               1,530,800
<CURRENT-LIABILITIES>                          404,800
<BONDS>                                        307,100
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                    165,000
<COMMON>                                         5,400
<OTHER-SE>                                     477,400
<TOTAL-LIABILITY-AND-EQUITY>                 1,530,800
<SALES>                                      3,666,700
<TOTAL-REVENUES>                             3,668,100
<CGS>                                        3,496,700
<TOTAL-COSTS>                                3,496,700
<OTHER-EXPENSES>                                32,600
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              25,600
<INCOME-PRETAX>                                 82,800
<INCOME-TAX>                                    33,900
<INCOME-CONTINUING>                             48,900
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    48,900
<EPS-BASIC>                                       1.27
<EPS-DILUTED>                                     1.17