Re: anyone running E-85
Yeah high comp in a sense. But not in a sense that they require high octane fuel.
But 2 strokes are different, detonation is really not a problem unless you have a hot spot on a piston.
Anyway, these motors are designed to run on 87 octane.
As far as new motors being 110-120, some, some are 100, and some are 140. And years ago, some were 80, or even 70.
All different motors with different designs.