Howdy,
At the advice of multiple mechanics and EZ owners, I've been running 50/50 ethanol-free 90 octane fuel and 100LL (yes, low compression pistons). In theory it should be great - Less lead to foul plugs (but still enough to lubricate), no ethanol to eat the epoxy, and save some $$!
The aircraft developed a leak in (at least) the right fuel tank. This annual I cut it open and sealed all surfaces with slow cure EZ Poxy. Going forward, should I continue running the 50/50 mix, or could it be the cause of the leak?
I've read that even though I've avoided the dreaded ethanol, there still could be a number of additives in auto fuel that may be even more damaging than ethanol. After this experience, I'll be pissed if I have to open up the fuel tank again.
Thanks for sharing your thoughts