Formulations aside, my big concern with buying mogas from a podunk airport
tank is that the gas could be old and contaminated. This would be due to
the
small number of planes that are actually set up to burn mogas.

That's interesting. Around here, the vast majority of personal planes
(which are predominantly Skyhawks and Cherokees of various flavors) have the
autogas STC.

I'm trying to figure out why anyone still uses 100 LL. It burns less
cleanly, fouls spark plugs -- and costs 50% more. If you have the autogas
STC, and aren't using it, you're just burning hundred dollar bills
needlessly.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"