CITGO is the third largest independent refiner, sixth largest branded gasoline supplier. CITGO dates back to the Cities Service Company which was founded in 1910 in Bartlesville, Oklahoma. This particular location, found at 1701 West Bay Drive near 20th Street NW. They have a number of well-placed pumps, a well lit lot, a vac station and air pump, as well as a convenience store selection as good as any other gas station in town.