AMOCO <AN> RAISES CRUDE PRICES Amoco Corp said it raised the contract price it will pay for most grades of crude oil by 50 cts a barrel, effective today. The company said the increase brings its posting for West Texas Intermediate to 19.00 dlrs a barrel. West Texas Sour, at 34 degrees API, was raised to 18.10 dlrs. The Light Louisiana Sweet grade was also increased 50 cts to 19.35 dlrs a barrel. Amoco said Wyoming Southwest Sweet, Colorado Western, and two Utah grades of oil, Black wax and yellow wax, were unchanged. The company last changed its crude oil postings on September 28.