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.
The STP 300 is a NASCAR Nationwide Series race held at Chicagoland Speedway in Joliet, Illinois. It replaces Gateway International Raceway as a part of the 2011 NASCAR Realignment.