That's what normal E-10 does every day of the week, and at no extra charge, imagine that.
I don't think water is the issue. I work seasonally for the DNR, we run 4 stroke little portable pumps, for water transfer. With out fail the little hondas will have a build up in the carbs usually after running 5 gallons of fuel thru it. Granted we get 5-7 hours of run time on 5 gallons but there is a build up that is problematic. I suggested startron and we have not had problems since.
That's a big myth. The amount of air in an empty tank, even if it was at 100% humidity, is a tiny amount of liquid water.Anybody ever hear of condensation in fuel tanks?