260 GTX

Sunoco® 260 GTX™ is an unleaded racing fuel that contains no oxygenates and no metallic additives.  260 GTX is a good fuel for many applications that need more detonation protection than typical street gas provides, yet cannot use a leaded fuel.  It has been shown to produce repeatable power levels in small block V8 engines to 12:1 compression ratio, and will tolerate more compression in engines with smaller or more efficient combustion chambers.

260 GTX is not a street legal fuel and is for off-road use only.  However, it will not harm sensors such as oxygen sensors used in fuel injection systems.  It is also an excellent choice where oxygenates such as alcohols and ethers are limited or banned by the engine manufacturer or sanctioning organization.

Sunoco 260 GTX contains additives to enhance shelf life and engine cleanliness.  However, as with any gasoline, it should be stored in opaque, tightly sealed containers where the temperature is stable.  Handled under such conditions, the shelf life of 260 GTX is in excess of 2 years.

Disclaimer: Legal in California only for racing vehicles in sanctioned racing events.
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Technical Details

Octane (R+M)/298
Research Octane103
Motor Octane93
Specific Gravity0.764
Weight (lbs/gallon)6.3
Reid Vapor Pressure5.4
10% Evaporation180
50% Evaporation219
90% Evaporation227
Stoichiometric Air/Fuel Ratio14.6
Oxygen (weight%)0
Ethanol (volume%)0
HC Ratio1.76
Lower Heating Value (Btu/Gallon)115800
Lower Heating Value (Btu/Pound)18240
Dielectric Constant1.6


  • Road Course
  • Asphalt Oval
  • Dirt Oval
  • Off-road
  • Rally
  • Drag
  • Motorcycle Road Course
  • Boats and Personal Watercraft
  • Miscellaneous Nitrous, Superchargers, Turbochargers

Sanctioning Bodies

  1. AMA Pro Racing

    AMA Pro Racing

    AMA Pro Racing is the premier professional motorcycle racing organization in North America, operating a full schedule of events and championships for a variety of motorcycle disciplines. 260 GT
  2. ARCA Racing Series

    ARCA Racing Series

    The ARCA Racing Series presented by Menards is the flagship division of the sanctioning body.  Strategically positioned as a driver development series as well as a destination for professional
  3. Canadian Superbike Championship

    Canadian Superbike Championship

    Canadian Superbike Championship is the premier professional motorcycle racing organization in Canada, operating a full schedule of events. Learn more about Canadian Superbike Championship at www.cs
  4. NASCAR Canadian Tire Series

    NASCAR Canadian Tire Series

    The NASCAR Canadian Tire Series is Canada’s top professional racing series. Since 2007, the series has travelled across Canada, thrilling fans while earning a reputation for exciting raci
  5. Pirelli World Challenge

    Pirelli World Challenge

    Divided into three classes (GT, GTS and Touring Car), the Pirelli World Challenge Championships are America’s top production car-based series. Competing on eight high-profile weekends in 2012
  6. Pro Mazda

    Pro Mazda

    The Pro Mazda Championship Presented by Cooper Tires debuts in 2013 as a new series, replacing the Star Mazda Championship which ceased operation in 2012 after 22 years. The series is sanctioned by
  7. US Formula 1 Powerboat Tour

    US Formula 1 Powerboat Tour

    US Formula 1 Powerboat Tour is North America’s Series for Formula 1 powerboats, Tunnel Boats racings premier class. The Formula One outboard, for nearly five decades, has been recognized as t