A very interesting article - http://www.chem.info/News/2012/01/Plant-Operations-In-a-First-Fuels-Are-Top-US-Export/
“There’s at least one domestic downside to America’s growing role as a fuel exporter. Experts say the trend helps explain why U.S. motorists are paying more for gasoline. The more fuel that’s sent overseas, the less of a supply cushion there is at home.
Gasoline supplies are being exported to the highest bidder, says Tom Kloza, chief oil analyst at Oil Price Information Service. “It’s a world market,” he says.
Refining companies won’t say how much they make by selling fuel overseas. But analysts say those sales are likely generating higher profits per gallon than they would have generated in the U.S. Otherwise, they wouldn’t occur.
The value of U.S. fuel exports has grown steadily over the past decade, coinciding with rising oil prices and increased demand around the globe.”