Bob,
The fuel thing is a whole can of worms. I have been told that ethanol is hard on rubber parts in the fuel line. Also I have been told that it attracts water, so it will pull moisture into your gas and that water can settle out and be hard on the fuel tank. The suggestions I have been given is that I should consider adding Stabil green (the marine stuff) to my gas if I use E-10. But I have found that the Libery gas stations in the Shen Valley also sell gas with no ethanol. I'm going to try to fuel up there, at least once she's up to the drive out to the Valley.