Is there much point anymore? Prices between stations vary so little now (In Canuckistan at least) that it hardly makes any sense worrying about ~$0.01 or driving an extra block to save it. Save by driving less and not using the drive through. Personally I also stay off highways.

You want high prices, try Iceland. It got so out of hand that truckers staged a protest and road blocks that by their standards they called it a riot.