[chris vickery]

Stuart
Ypu are correct that the list does change.
As a rule of thumb, I use hi test fuel in all of my antique and lawn and garden equipment.
I do add fuel stabilizer anyways over the winter just in case.
I also try to make sure that I do not store fuel for more than 6 months at a time. If its been around, throw it in the truck and get some more fresh stuff.
The main issue with ethanol is WATER, alcohol attracts water. The condensation in your half full fuel tank is absorbed into the gasoline by the ethanol. Once the water concentrate titrates out of the gasoline it settles into the bottom of your fuel tank, your carb etc. Now you have water in your fuel system which leads to all sorts of problems...
I found out recently with a snowblower that was giving my friend some issues. The reason it would not start was water in the fuel. Once the fuel was drained and flushed out and some new fuel and a new plug added it started up immediately.