USX's subsidiary, Marathon PetroleumCo, said it will raise its contract prices for eleven grades of
crude oil 50 cts a barrel, effective tomorrow.
    The increase brings Marathon's posted price for West Texas
Intermediate and West Texas Sour grades to 17.50 dlrs a barrel.
    The Light Louisiana grade was also raised 50 cts to 17.85
dlrs a barrel.
 Reuter
