Logo on some NASCAR autos

• Logo on many a Richard Petty race car
• Racing Series Octane Booster maker
• Brand of motor oil
• "The racer's edge" brand
• Gas-tank additive
• Rival of Havoline
• Popular fuel additive
• Additive sold at Napa Auto Parts
• Gas additive and NASCAR sponsor

Wikipedia Word definitions in Wikipedia
STP may refer to: