Sounds like you have addressed all the issues that might arise from burning
"good" mogas. Obviously, nothing can insure failure from bad or contaminated
fuel, whatever the grade. I had insulated all my firewall-forward tubing
during the original construction, but insulation only delays heat, it
doesn't stop it. Sometimes I wish I had a thermometer which would monitor
under cowl temps. When it gets hot out, I can't believe the blast furnace
air that emits from the oil filler door. I remember one featured airplane in
Sport Aviation which had cowl vents which fell open whenever there was no
air pressure inside the cowl. Seems like a good idea to vent the hot air
when you shut down.

All good ideas. I, too, have often wondered why I have all the data
in the world on my JPI engine analyzer, but no "under-the-cowl"
temperature readings.

I suppose CHT and EGT are the pertinent temps, but that doesn't show
what all those hoses, wires, and connections are enduring. I'd bet
it's well over 200 degrees at the firewall, in the summer during a
long taxi -- but I don't honestly know.

Regardless, as you know we've run over 8500 gallons of mogas through
Atlas (and an unknown amount through our old O-320-powered Warrior)
without so much as a burp. Different fuel systems, I guess.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"