My '75 550F which isn't ridden gets ethanol free gas with a fresh tank fill every fall before winter....it still runs great.
My 02 camaro gets ethanol free also ,is driven maybe 600 miles a year, runs excellent...
The 08 silverado, 2012 volvo, and 2013 camry get the grocery store discount gas,ethanol...so far ,no issues..
My boat gets marine gas mostly which is ethanol free...sometimes gets store gas....
Lawnmower, snowblower, tiller, edger, powerwasher get ethanol, haven't had any issues....yet. I use techron and stabil at the end of the year before storage.
what I've learned about gas....
All gas stations are mandated to have a minimum amount of cleaning agents in their fuel. Top tier labeled stations advertise they have more, or better cleaners, mainly for reduction of carbon deposits and injector cleaning, not to treat the gas because of ethanol.......I always perferred texaco or conaco...which are disappearing.....but that was before the grocery store gas points program.
Ethanol might cause issues mainly in systems that are exposed to air, and older design gaskets .such as our old bikes. Also yard equipment, boats have unsealed fuel systems, so maybe an additive is needed....
I like project farms test analysis on you tube...a good guy..
However, cars have sealed fuel systems which inhibit exposure to moisture, which is the primary problem with ethanol fuel. So, I don't use additives in the cars anymore.