North American oil is dirtier and the refining costs more, most NA oil is sold to Asian refiners where the enviromental laws are more lax than ours. Lets use theirs up first and save ours. After the Middle Eastern deposits start to dry the prices will go up and we will get our money back on a much larger scale. Of course that doesn't mean a whole lot to the working guy who has to pay market price for a gallon of gas just to get to work, either way the oil refiners will continue to keep their profit margin just as high as possible.
Never argue with an idiot, they will drag you down to their level and beat you with experience. Winston Churchill
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