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Related Clues:
- Gas additive brand
- Slick 50 rival
- Big name in petroleum, once
- Big inits. at Indy
- It once had a jingle with the line "One little can will keep you running free"
- Sunoco rival
- Motor Up alternative
- Additive that sponsors NASCAR racers
- Slick 50 alternative
- BP merger mate
- Engine performance aid
- Big car racer sponsor
- Additive that once sponsored Richard Petty
- Indy inits.
- Big name in gas