	canadian oil companies raise  prices petro canada the state owned oil company said it raised the contract price it will pay for  oil canadian cts a barrel effective march six petro canada s posted price for the benchmark light sweet grade edmonton swann hills at api gravity now stands at canadian dlrs bbl their light sour grade is posted at canadian dlrs bbl earlier today shell canada shc said it raised its  postings about canadian cts bbl bringing edmonton light sweet to canadian dlrs bbl and the light sour  to canadian dlrs bbl imperial oil imo a a pct owned subsidiary of exxon corp said that effective march five it also raised its light sweet  posting to canadian dlrs bbl reuter 
