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3. Valvoline alternative

Alternative clues for the word stp

• Pennzoil alternative
• Racecar fuel additive
• Longtime sponsor of racing's #43 car
• Brand of motor oil
• Motor oil additive brand
• Brand of power steering fluid
• "Interstate Love Song" band (abbr.)
• Popular Formula One formula briefly
• Big brand with an oval logo
• Letters at a Nascar race