Oil Change International

Yes, and that's a good thing, say opponents of lifting the 1975 ban on crude oil exports. Brad Plumer examines this argument and explains the two other chief reasons, the environment and refinery lobbying, to maintain the ban on exporting crude oil.
Jan 10, 2014   The Washington Post - Wonkblog
Petroleum coke or petcoke, similar to coal, is a nasty though salable byproduct of the oil refining process. Produced from refining tar sands crude in Indiana refineries, it is stored in huge piles in Chicago, blowing dust in the Southeast Side.
Dec 28, 2013   NPR Morning Edition