Jay Honeck wrote:
So, rather than bitching about the world turning to a gasahol blend
of some sort (which it seems to be doing) let's light a fire under
those who hold the STCs to determine WHY gasahol is bad for the
aircraft environment and do something about it.

Bravo! I've been asking this for years, to no avail.

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?

Really. Solve the problem, not the symptom.