Possible Clues:

• Sponsor at Indy
• Major NASCAR sponsor
• Auto oil additive
• Racer's sponsor, perhaps
• Brand known as "the racer's edge"
• Auto-additive initials
• It once had a jingle with the line "One little can will keep you running free"
• Product at a gas station
• 1999 Clorox acquisition
• Auto-racer sponsor