Related Clues:
- Brand of motor oil additive
- "The racer's edge"
- Motor-oil additive
- Old antiknock fuel
- Gas treatment letters
- ''The racer's edge''
- -- alcohol
- 1985 Union Carbide acquisition
- Booze component
- Antiknock additive
- Long-time NASCAR sponsor
- Auto-racing sponsor
- Tractor powerer, maybe
- Word on old gas pumps
- Product of yeast fermentation