In my area it's possible to buy "Non-oxygenated Premium". This is gasoline that does not contain ethanol. The Octane rating is increased by adding more ether to the gas blend.
My experience tells me that adding gasoline stabilizers and additive cleaners is not a one-blend, one-fix situation for all engines. Example: I was responsible for the care and maintenance of 125 small engines that were stored over Winter. After the yearly maintenance steps, these engines and equipment all had their fuel tanks filled and appropriate Stabil amounts added to the tanks and run to fill the carbs. At Spring startup all of the engines started and ran fine except 12 small Kawasaki engines. Upon examination, it was found that all of them had a blockage of what appeared to be fuel residue in the main jets. When the jets were cleaned all worked perfectly. In hindsight, it may be that an air passage in the carburetor body allowed enough air into the main jet to dry the fuel. Henceforth, these engines were then drained of fuel for Winter and the problem disappeared.