[dragonwriter]

> The USA can't export crude (by law)

That's not entirely true; by law, there are all kinds of special permissions (with different rules depending on what oil -- both by origin and type -- you are exporting, to whom, and whether or not the export of crude is matched by an in-exchange import of crude [usually, of a different grade, otherwise this wouldn't make any sense]) required to export crude, but its not quite banned.