I think you might be addressing the other thread where the
discussion was about a hesitation or stumble when you hit the
throttle. I don't think it's just the alcohol in the gas
that's causing the problems. I believe it's in the formulation
as a whole.
I built and flew a biplane when I lived at an airport, and we
had 100LL and leaded auto fuel at the pumps. Some of the
planes had been been certified to use leaded auto gas. I tried
a couple of tank fulls in my 216 and it made no noticeable
difference.
That for a while caused me to think that it wasn't the fuel
but some other mechanical problem with the carburetors. But
the leaded auto fuel that was approved for some planes was
also coming out of the same refinery as the E-10 and subject
to similar refining chemistry. The aircraft have a mixture
adjustment on the throttle and they are adjusted much to the
same effect that I get when I apply a small amount of choke
to the truck carb. So again, the new cars computer adjusts the
mixture, the mixture is adjusted by the pilot on an aircraft
engine and the old truck carburetors have to be re-jetted.

DG

Denny G
Sandwich, IL