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EAA began testing and evaluating alternate fuels for aircraft piston engines in 1964. These included not only automobile gasoline, but also ethanol.
In 1982, EAA successfully changed FAA policy to consider the use of automobile gasoline in aircraft. The EAA type certificate program resulted in an FAA Supplemental Type Certificate (STC) being issued for the use of automobile gasoline, rather than aviation gasoline, in the Cessna 150 aircraft, powered by a Continental O-200 engine.
The first pilot to legally fly in an aircraft with automobile gasoline was then-FAA Administrator Lynn Helms. Since then, more than 24,000 STCs have been issued by EAA.