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3. Logo on many a Richard Petty race car

Alternative clues for the word stp

• Longtime Indy sponsor
• Oil additive letters
• Popular fuel additive
• Fuel additive known as "the racer's edge"
• Pit stop can
• Common fuel additive
• Oil treatment inits.
• Pit stop stuff
• Its slogan is "The Racer's Edge"
• Had smash debut "Core" (abbr.)