Goldbrix54, perhaps you missed my point, I am not in any way enamored with the US or the shale oil plays as a way of making money. I am simply saying that the cost of producing oil from the oil sands needs to be significantly reduced if it is to survive as a Canadian source of oil, regardless of who you want to sell it to.
Note as well that if the US dollar falls as we all expect it will, the price of US oil will fall with it, making all other suppliers un-competitive to the rest of the world including China who needs a lot of oil to do what you are saying they will do.
The US dept held by China will be worth less and less (which is the whole point the US is dropping the value of their currency).
We all have different points of view, on that we agree, who knows if any of them have any value at all.