Foreign Policy (blog) | Saudi Arabia Now Controls the Largest Oil Refinery in North America Foreign Policy (blog) The Port Arthur refinery in Texas is North America's largest oil refinery, and as of this week Saudi Arabia controls all of it. With the stroke of a proverbial pen, Saudi's state-owned oil giant Aramco took on 100 percent ownership of the port ... Oil slump has hit Saudi Arabia's spending: Prince Saudi Arabia pushes through pain of breaking oil habit What Mexico's Falling Exports Mean For Oil Prices |