advise on E30 ethanol

will your rubber & plastic parts survive the effects of the alcohol? E30 has way less moonshine in it than 85 but is it still enough to mess with rubber and plastic? Good question. E30 is 95 octane so from an octane point you'll be fine. I'd step up a couple of jet sizes and then check if I'm "fat" or "skinny" on my AF ratio. I'd rather be a little fat than skinny, skinny is normally followed by bad stuff happening inside!