Answer: stp

AnswerCrossword Clue
STPGranatelli's additive
STPThe Racer's Edge
STP500 letters?
STPFuel additive brand
STPIconic Nascar sponsor
STPLongtime Indy sponsor
STPLongtime Richard Petty sponsor
STPSponsor initials at Indy
STPBig name in gas treatments
STPIndy additive
STPGTO booster
STPMaker of Son of a Gun! protectant
STPOil product introduced in St. Joseph, Mo.
STPPetty associate
STPIndy supplement
STPNASCAR sponsor since 1971
STP1985 Union Carbide acquisition
STPAuto maintenance letters
STPBig name in auto additives
STPEngine performance aid
STPBrand at the Daytona 500
STPMotor-oil additive
STPGas additive
STP"The Racer's Edge"
STPEngine additive
STPBig name in fuel additives
STPBig Nascar sponsor
STPIndy sponsor
STPPopular oil additive
STP"The racer's edge"
STPGasoline-additive initials
STPOil-treatment letters
STPMotor oil additive
STPNASCAR sponsor
STPIndy 500 letters
STPGas additive brand
STP"The Racer's Edge" letters
STPLogo seen on Indy cars
STPLongtime sponsor of Nascar racers
STPIndy 500 advertiser