How nice would high octane gas be?

that was my point..i was using ethanol free shell 91.I have had regular gas go bad in stored roto tillers,and lawn mowers too.
Sure You have, so have I, only it took YEARS to completely sour unless it was a very small partially filled container(such as a mower/tiller etc.). Now it takes no time because
of the highly accelerated oxidative nature of the ethanol mix, no to mention the absorption of water right out of the air drawn into the tank. My trusty & ancient '72 Gravely
sits out unheated every day of the year, and I would go out & fire it up every spring mow out 1/2 a tank, then top it of with fresh. Now i do it, but when I pop the cap, the
fuel has a cloudy look to it. My Pop bought it from the orig. owner in '76, I brought it out here in '96, that's how long & familiar I am w/this lawn tractor....& I am still using
it!! I earned money for My go-kart, YL1 Yamaha, AFX cars & track, & towards My 1st car, My '69 Dart Custom HT w/that thing!!!