quote Theo:
I’ve heard of (and experienced) the bad things that come when you run high concentrations of methanol, having raced on M-85 for one season, but I hadn’t heard that ethanol had the same corrosive effect. I also don’t know if the smaller percentages (10 to 15%) of ethanol would have any significant effect beyond what the additives that are already in gasoline would do to the rubber parts in your fuel system.
From what I have gathered on the SAOCA.org pages is that the gas added materials that is being stuck in the tanks not to much of a problem except for storage. As far as the rubber question I haven’t heard anything yet.
If you are storing "Like I do" a car over winter make sure the tank is completly full, as it’ the materials" gather water. Thus causing rust, hard startings and other things we all do not need.
I will be using an additive to my Alpine engine this year an octane booster ,BUT only every other tank full.
Good luck in your ventures
Chuck In the Oregon Area