Not quite. The oil from the oil sands comes out in two forms: synthetic crude (phenomenally good feestock) and dilbit (dilluted bitumen). The former is less quantity than the latter, and used up by Big Oil refineries in AB for the most part. The latter is what is mostly being produced in newer sites (requires much simpler, cheaper facility) and feeds anything with upgrading capacity (cokers). The reason we buy crude oil at all has more to do with pipeline capacity than anything else. We produce a LOT of crude oil in the West, but use a lot of product in the East, so Eastern refineries can buy from tankers what the pipelines don't have capacity to send East (don't ever reach some of the big ones at all). Also, there is NO way to get any serious volume Westbound (one tiny pipe to Vancouver, no where near enough to make any difference), so the bulk of the oil goes SOUTH to US - thus the big deal about the Keystone pipeline. The added capacity of the Bakken has filled what little capacity for growth was needed for alberta crudes, and has driven the wellhead price for both conventionals in AB, SK, ND down to nothing, and heavies from AB, WY, etc. into the toilet.
So, a Canadian refiner could buy some nice Rainbow from North Central AB for about half the price of a Brent indexed crude on the water - but there is no way to GET it to the East or West coast, and the way South is constipated. Costs the governments of AB and SK a bundle in lost royalties so badly we can barely run a surplus in our budgets. Meanwhile, AB and SK refineries can make out like bandits on cheap domestic crude.
BTW: that "cheap to recover" oil from the Middle East benefits the Middle East, not Western buyers. Crude still trades internationally pretty close to the Platt's reports, regardless of cost of production. Nor is it all that cheap any more (lifting costs in Saudi make production costs in the mid-$30 range) as many big fields are in the later stage of secondary recovery. Most of my friends over there are coming over here to learn how we do tertiary enhanced oil recovery.
Well you be sure and let us know when the US, Canada and Mexico stop importing oil. Also let us know when you have found a way to recover it and burn it that doesn't release CO2.