UNOCAL <UCL> RAISES CRUDE OIL POSTED PRICES Unocal Corp said it raised its posted prices for most U.S. grades of crude oil by 50 cts a barrel, effective October 16. The move brings the price the company will pay for the U.S. benchmark grade, West Texas Intermediate, and West Texas Sour to 19 dlrs a barrel. The price was last changed September 9, Unocal said.