Sunoco® Supreme™ is a 112 octane leaded race fuel designed for competition engines routinely operating over 7,000 rpm and in many cases well over 10,000 rpm.  Supreme is blended to achieve a high motor octane number and fast burn speed to ensure engine protection lap after lap and pass after pass.  It features a comprehensive additive package to enhance shelf life by improving storage stability and minimizing oxidation.  Sunoco Supreme is designed for compression ratios up to about 15:1 in small block V8s, and can tolerate higher compression ratios in smaller or more efficient combustion chambers.  Supreme’s fast burn speed also makes it a popular choice for 2-stroke applications.

As with any gasoline, Sunoco Supreme should be stored in opaque, tightly sealed containers and kept where temperatures are stable.  Properly stored, the shelf life of Supreme is in excess of 3 years.

Disclaimer: Legal in California only for racing vehicles in sanctioned racing events.
Click Arrows to Expand

Technical Details

Octane (R+M)/2112
Research Octane115
Motor Octane109
Specific Gravity0.715
Weight (lbs/gallon)6
Reid Vapor Pressure5.5
10% Evaporation164
50% Evaporation217
90% Evaporation232
Stoichiometric Air/Fuel Ratio15
Oxygen (weight%)0
Ethanol (volume%)0
HC Ratio2.12
Lower Heating Value (Btu/Gallon)112100
Lower Heating Value (Btu/Pound)18800
Dielectric Constant-0.7


  • Road Course
  • Asphalt Oval
  • Dirt Oval
  • Off-road
  • Rally
  • Drag
  • Truck and Tractor Pulling
  • Motorcycle Road Course
  • Off-road Motorcycle and ATV
  • Karts
  • Boats and Personal Watercraft
  • Snowmobiles
  • Muscle Cars and Vintage Cars
  • Miscellaneous Nitrous, Superchargers, Turbochargers