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3. Gas tank additive

Alternative clues for the word stp

• NASCAR-sponsoring additive
• Valvoline rival
• Brand at a gas station
• Richard Petty sponsor
• Its slogan is "The Racer's Edge"
• Fuel additive brand that sponsors many auto racing events
• "Plush" band, initally
• Motor oil additive
• Petty cash source?
• Logo seen on race cars