Related Clues:
- Auto additive brand
- Letters on oil cans
- Auto-additive initials
- The Racer's Edge
- Brand known as "the racer's edge"
- Freelancer's enc
- Automotive engineers' org
- Iconic Nascar sponsor
- Talladega decal
- Bill accompanier: Abbr
- Racecar fuel additive
- Letter encl. to facilitate a reply
- Letters on oilcans
- R.S.V.P. facilitator: Abbr
- Sponsor at some NHRA events