<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THESE AMOUNTS HAVE BEEN RESTATED FOR THE ACQUISITION OF MAPCO INC., WHICH WAS
ACCOUNTED FOR AS A POOLING OF INTERESTS.
</LEGEND>
<RESTATED> 
<MULTIPLIER> 1,000,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                             173                     165                     121
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                      855                   1,051                   1,204
<ALLOWANCES>                                        10                      11                      11
<INVENTORY>                                        221                     288                     320
<CURRENT-ASSETS>                                 1,499                   1,785                   1,969
<PP&E>                                           5,481                   5,715                   6,013
<DEPRECIATION>                                   1,544                   1,595                   1,647
<TOTAL-ASSETS>                                   7,257                   8,032                   8,439
<CURRENT-LIABILITIES>                            1,350                   1,431                   2,157
<BONDS>                                          1,491                   1,982                   1,561
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                             0                       0                       0
<OTHER-SE>                                       3,301                   3,368                   3,443
<TOTAL-LIABILITY-AND-EQUITY>                     7,257                   8,032                   8,439
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                 1,459                   2,946                   4,638
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                    1,302                   2,666                   4,226
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     1                       2                       7
<INTEREST-EXPENSE>                                  26                      60                      95
<INCOME-PRETAX>                                    195                     318                     406
<INCOME-TAX>                                        70                      97                     132
<INCOME-CONTINUING>                                125                     221                     275
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                       125                     221                     275
<EPS-PRIMARY>                                        0                       0                       0
<EPS-DILUTED>                                        0                       0                       0
        

</TABLE>