In the last two months of 2018, the U.S. Gulf Coast exported more crude oil than it imported. U.S. crude oil production, particularly in the U.S. Gulf Coast region, has increased in recent years. In November 2018, U.S. Gulf Coast crude oil production set a new record of 7.7 million b/d. The increased production is mostly of light, sweet crude oils, but U.S. Gulf Coast refineries are configured mostly to process heavy, sour crude oils. This increasing production and mismatch between crude oil type and refinery configuration allows for more of the increasing U.S. crude oil production to be exported.