​Our goal is to eliminate the use of leaded aviation fuels for piston-engine aircraft in the United States by the end of 2030 without adversely impacting the safe and efficient operation of the existing fleet.

Introduction to the authorization processes


FAA Authorization for New Fuel

There are two pathways available to obtain FAA authorization for the use of a new fuel.

Supplemental Type Certificate Process

  • Traditional FAA aircraft type certification process.
  • GAMI and Swift are pursuing FAA STC approval for high-octane unleaded fuel use.

Fleet Authorization Process

  • FAA aviation fuel fleet authorization process established by Congress through a collaborative industry/government testing program.
  • LyondellBasell / VP Racing are pursuing FAA authorization of a high-octane unleaded fuel through the PAFI.


The following charts provide information on the pathways and fuel specifications. For additional detail click here