I’ve always parked my mowers with E10 in the unheated garage for the winter. Always started easy next spring.
The Honda engine is the only one I did anything special for. Carburetor needed to be run dry to restart in 2 weeks or 4 months. Gas in tank was fine.
E10 in my zero-turn is about 6...
With ethanol the initial water will stay in suspension, not at the bottom of the tank. Water in suspension leans the mixture and affects your state of tune.
Pumps take fuel from the bottom also too.
I want oil in my engine during storage. If moisture gets in I want it captured by the oil not...
Can use “good fuel” until one is blue in the face and still have problems.
There is the matter of handling the gas can.
There is the matter of the design of the mower and it’s gas cap.
Bought Snapper 21” “Ninja” mulcher about 2013. B&S engine. Horrible quarter turn gas cap on a...