GAMI Gains Avgas STC for Pistons on Unleaded Fuel

The approval comes after the broad and ongoing compliance of the manufacturer's fuel in aircraft across the fleet.

Friday, September 02, 2022 at 08:25 AM ET

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The distribution of unleaded fuel will be initially driven by industry partners to the EAGLE initiative, such as Avfuel. [Photo: Julie Boatman]

Key Takeaways:

General Aviation Modifications Inc. (GAMI) has received FAA supplemental type certificate (STC) approval for its 100-octane unleaded fuel (G100UL).
This STC broadly authorizes G100UL for use in every spark-ignition general aviation engine and all corresponding airframes, including higher-compression engines.
The approval is hailed by the general aviation industry as a critical milestone towards eliminating leaded avgas (100LL), ensuring environmental protection and the future viability of GA.
While a significant step forward, industry leaders note that more work is needed for commercialization, distribution, and the ongoing development of other unleaded fuel alternatives.

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A milestone in the search for an unleaded fuel replacement for 100LL avgas has been met.

General Aviation Modifications Inc. (GAMI) announced yesterday that its 100-octane unleaded fuel (G100UL) gained FAA supplemental type certificate (STC) approval for use in every general aviation engine using spark-ignition, and each airframe in which those engines are currently operated. This will include higher-compression engines not covered by GAMI’s previous STCs.