CANADIAN OIL COMPANIES RAISE CRUDE PRICES Petro-Canada, the state-owned oil company, said it raised the contract price it will pay for crude oil 64 Canadian cts a barrel, effective March six. Petro-Canada's posted price for the benchmark light sweet grade, Edmonton/Swann Hills at 40 api gravity, now stands at 21.95 Canadian dlrs/bbl. Their light sour grade is posted at 19.88 Canadian dlrs/bbl. Earlier today, Shell Canada <SHC> said it raised its crude postings about 47 Canadian cts/bbl, bringing Edmonton light sweet to 21.95 Canadian dlrs/bbl, and the light sour crude to 19.95 Canadian dlrs/bbl. Imperial oil <IMO.A>, a 70 pct owned subsidiary of Exxon Corp, said that effective March five it also raised its light sweet crude posting to 21.95 Canadian dlrs/bbl.