Yeah you can’t run the crap alcohol gas in piston powered aircraft, they require leaded fuel only so Leaded is the best fuel for aircraft and for marine applications as far as I’m concerned when losing your engine power can be critical
And from being in the mostly free use era mopeds in the 70s I could tell you that mopeds and dirt bikes I had or ran in the 70s/early 80’s ran better on the leaded regular gas then today’s junk gas sold in my area now as far as stock bikes go with less seizures
Most my bikes now are not stock and carbs not stock either, I would love to be able to try regular leaded gasoline in the same octane of this gas-a-hall air pollution formula configuration gas I’m forced to use and compare the power and well as head temperatures.