Using Ethanol in Your Plane

Kyle Boatright wrote:

Isn't the issue that because of the required fuel/air mixture, an engine
running on Ethanol is going to run lean, assuming the carb or fuel injection
system is configured for gasoline?

Other than the wingtip issues, I wonder if there are hidden problems due to
the ethanol. No telling what impact ethanol has on fuel tank sealant,
hoses, seals, etc.

Ethanol unlike gasoline is hydroscopic. This causes problems with
swelling of rubber fuel components as well as increased corrosion
problems.