<< I filled up with gas that contained 10% ethanol
 I normally don't leave ethanol stored in my full tank over winter, I
don't want it sitting in my hoses.>>

Interesting.

What regular gasoline are you buying that doesn't have any ethanol in
it?

The only petrol I know of that doesn't have any alcohol in it is BP
Gold Premium.
Big dollar gas for a Vanagon.