Engines
GAMI Gains FAA STC for High-octane Unleaded Avgas
An unleaded replacement for leaded 100LL avgas is on the short-term horizon and may solve a difficult problem for general aviation.

The FAA’s Wichita, Kansas, Aircraft Certification Office issued a supplemental type certificate (STC) to General Aviation Modifications Inc. (GAMI) last week for use of its high-octane unleaded avgas, initially in all models of the Cessna 172. The STC will be expanded using the approved model list process to cover additional aircraft and engine combinations for GAMI’s G100UL avgas.


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