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GAMA Statement on FAA Approval of GAMI Unleaded Avgas STCs

GAMA NEWS 22-46 For Immediate Release: Sep 1, 2022

Sep 1, 2022
Contact: Andre Castro


GAMA Statement on FAA Approval of GAMI Unleaded Avgas STCs 

WASHINGTON, D.C. –  General Aviation Manufacturers Association (GAMA) President and CEO, Pete Bunce, issued the following statement regarding the FAA’s approval of Supplemental Type Certificates (STC) to allow General Aviation Modifications Inc.’s (GAMI) 100-octane unleaded fuel (G100UL) to be used in every general spark-ignition engine and every airframe powered by those engines:

“As we continue to work towards a safe and reliable transition to an unleaded future state for piston-engine aircraft, FAA issuance of a broader STC for GAMI’s G100UL is a significant milestone. Manufacturers look forward to having an opportunity to understand the composition and performance of this new fuel to support commercialization and use as a viable replacement for 100LL.” 

The type certification process and issuance of the STCs means the FAA has found that engines and aircraft operating on the new G100UL fuel continue to be compliant with the applicable airworthiness safety standard requirements such as Part 33 for engines and Part 23 for airplanes. Manufacturers understanding of a new fuel is essential to continued operational safety regulatory responsibilities and business activities such as customer technical support, warranty services and consideration of incorporating the new fuel in manufacturer issued service and approval documents and new production engines and aircraft.  

As a stakeholder in the Eliminate Aviation Gasoline Lead Emissions (EAGLE) initiative, GAMA supports the general aviation industry’s ultimate goal of a practical unleaded avgas that can replace 100LL and will continue to support Afton/Phillips66 and Lyondell/VP-Racing advancing through the EAGLE fleet authorization testing & evaluation process and supporting deployment of Swift Fuels and GAMI working through the FAA STC certification process.  




GAMA is an international trade association representing over 100 of the world's leading manufacturers of general aviation airplanes and rotorcraft, engines, avionics, components and related services. GAMA's members also operate repair stations, fixed based operations, pilot and maintenance training facilities and manage fleets of aircraft. For more information, visit GAMA's website at


Communications Director:
Andre Castro:
General Aviation Manufacturers Association
Headquarters: (+1) 202-393-1500
European Office: (+32) 2 550-3900

GAMA exists to foster and advance the general welfare, safety, interests, and activities of the global business and general aviation industry. This includes promoting a better understanding of general aviation manufacturing, maintenance, repair, and overhaul and the important role these industry segments play in economic growth and opportunity, and in serving the critical transportation needs of communities, companies, and individuals worldwide.