I've been running e10 for as long as I can remember, never had any trouble. My father, a farm machinery mechanic, did experience alot tune ups after the farmers started switching to e10 gasoline, but I'm sure most of the 20-30 year old grain trucks needed it anyhow. As far as drawing moisture, anything whether it is diesel, gas, or ethanol will draw moisture after it sits for awhile. Just some food for thought, I use to haul fuel to gas stations and none of my stations with e10 ever had any water or moisture problems. The only ones with moistue and water problems were the ones with straight product.