The problem is that the alcohol has a high octane. It is mixed into the fuel and falls out of suspension when it absorbs 5%(?) water by volume. Then your octane drops significantly and detonation occurs.
And to think.. Tpaw mandated E-20 for those of us in Minnesota..
we can get E0 but it’s only sold as premium for collector cars and small engines.
BTW, my 01 Venture van and 02 Express are “collector cars” in my book.
So far, only one station questioned me. I said “do you want to sell fuel or not?” they turned the pump on.
and gas without the octane boosting ethanol doesn’t?