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Alternative clues for the word stp

• Engine additive since 1954
• Initials on some Indy cars
• Motorsports brand
• Big name at Indy
• Daytona 500 advertiser
• Fuel additive brand that sponsors many auto racing events
• Condescend
• 1985 Union Carbide acquisition
• Big inits. in fuel additives
• The Racer's Edge