STP is a brand name and trade name for the automotive additives and performance division of Armored AutoGroup. Founded in 1953 in Saint Joseph, Missouri, the company’s name, STP, was derived from “Scientifically Treated Petroleum”.[1] The company entered into the marketplace with one product, STP Oil Treatment.
Martinsville Speedway is an International Speedway Corporation-owned NASCAR stock car racing track located in Henry County, near Ridgeway, Virginia, just to the south of Martinsville. At 0.526 miles in length, it is the shortest track in the NASCAR Sprint Cup Series. The track was also one of the first paved oval tracks in NASCAR, being built in 1947 by H. Clay Earles. It is also the only racetrack that has been on the NASCAR circuit from its beginning in 1948.