Speedway LLC was created in 1959.
"Speedway SuperAmerica LLC is a gasoline-convenience store company. We operate stores primarily under the Speedway and SuperAmerica brand names. Speedway SuperAmerica LLC is a wholly owned subsidiary of Marathon Oil Corporation." source: http://www.speedway.com/aboutUs/Default.aspx
Islip Speedway was created in 1947.
Västervik Speedway was created in 1966.
Speedway Motorsports was created in 1994.
Owosso Speedway was created in 1939.
Uniontown Speedway was created in 1916.
Seekonk Speedway was created in 1946.
Langhorne Speedway was created in 1926.
Portland Speedway was created in 1924.
Cayuga Speedway was created in 1966.
Beltsville Speedway was created in 1965.
Elitserien - speedway - was created in 1982.