Related Clues:
- Additive that once sponsored Richard Petty
- Indy inits.
- Letter enc., maybe
- Valvoline alternative
- Indy 500 inits.
- Brand for a gearhead
- Richard Petty sponsor
- Additive at Indy
- Brand at a gas station
- Letters on a can of motor oil
- Engine oil additive
- Auto-racer sponsor
- 1999 Clorox acquisition
- R.S.V.P. facilitator: Abbr.
- Valvoline rival