Dear lord. People have lost thier minds.
NO!!
Plain old Gasoline, with no ethanol in it...PURE Gasoline...the original stuff won't burn too hot for air cooled motors period.
Folks have been using real gas in air cooled motors for several months now...and shockingly there have been few problems. Talk is of flying machines using air cooled motors running non-ethanol gas someday, when we are trusted to play with such things.
It actually burns cooler, and produces 4-6% more energy, and in a carbed motor will run RICH compared to the corn contaminated garbage, until the carb is adjusted to compensate.
Whoever told you that it was, is not to be trusted around pointy things for thier own good.