Ethanol-free automotive gasoline used to be widely available for airplanes that didn’t require 100LL, but the formulations have changed dramatically in recent years. More stringent air quality and renewable fuel regulations, for example, have resulted in increases in the use of ethanol as an emissions-reducing oxygenate. Airworthy’s gasoline will contain no ethanol. The company says it will use a patent pending formulation that meets or exceeds the requirements of ASTM D4814, Lycoming Engine’s SI-1070 “S” specifications and the numerous autogas supplemental type certificates.