[DSM351]

Here in Iowa, we have had ethanol (E-10) here for almost 30 years.

It's not that big of a deal, except the rubber fuel lines aged very rapidly- needing replacement every 3 or 4 years or so. They fixed that about 20 years ago.

I my experience it will not hurt anything metalic unless it sits unused and then absorbs water from the atmosphere, then it becomes VERY corrosive. You just don't want to let it sit, and/or get any water in it, or it is a BIG deal.
That is why the marine users are having so much trouble.

Cheers,