GAMI (General Aviation Modifications Inc.) is we’ll known for its GAMIjector fuel nozzles, several turbonormalizing engine upgrades and, most recently, for developing the first (and so far, the only) high-octane unleaded aviation gasoline. Known as G100UL, it was approved by the FAA in 2022 to operate in all piston, spark-ignition aircraft engines and is currently the only avgas to have an FAA-approved commercial production specification.
I have been aware of GAMI’s unleaded fuel development program since it began in 2009. With its 2022 FAA approval, I added G100UL to the fuel limitations section of the Airplane Flight Manual for my completed Van’s RV-14 (“White Lightning”) prior to its FAA inspection and licensing. To my knowledge, as the builder/manufacturer of the aircraft, I became the first to approve operation on an unleaded 100-octane aviation gasoline. And so I made a stop at GAMI’s Ada, Oklahoma, headquarters and tanked up with G100UL.