Speedway LLC operates a number of gas station and convenience store combinations and is based in Enon, Ohio. Locations that operate under their name are found along the East Coast of the United States as well as the Midwestern states. Speedway LLC is a wholly owned subsidiary of Marathon Petroleum Corporation and ranks as the largest chain in Central Ohio. The company had its beginnings in Michigan as Speedway 79, the name they operated under for the first half of the 20th century. Then, in 1959, Marathon, who was then known as the Ohio Oil Company, bought the chain and turned its locations into Marathon locations instead. In 2009, the name Speedway was fully adopted.