"Jay Honeck" writes:

What the heck is in an aircraft engine/fuel system that can't be made
"ethanol safe" for more than a few bucks worth of rubber seals?

A pilot. Aviation is full of old farts who will latch on to some
anecdote about something being unsafe. They'll stop right there
instead of investigating to get good information. Even the thoughtful
pilots will often get shot down in their quest for good information.
http://groups.google.com/group/rec.a...14f6e1df76730c

My guess is that you'll have to wait for a new generation of pilots to
fully embrace ethanol.

--kyler