I always use non-ethanol gas with Marine Sta-bil, and fill it to the top. In my mind it keeps condensation from forming in the gas tank. Have never had a problem with any of my equipment or Motorcycle. Have done this for years and they start right up every time. Different things work for different people. I am sure you will get a lot of different answers. Just my two cents.
I once had a computer beat me at Chess, but it was no match for me at Kickboxing.
Exmark Lazer ZX 29 hp Kaw 60in.
Exmark Turf Tracer HP 19hp Kaw 48in.
Honda HRX 217 21in.
Stihl FS90R Trimmer
Stihl FS250R Trimmer
Stihl FC 110 Edger
Stihl BR600 BackPack Blower
Stihl MS261 Pro Chain Saw
Stihl HT 131 Pole Saw
Stihl SG20 BackPack Sprayer
Kawasaki KHT 600D Hedge Trimmer
Kawasaki KCL 525A Extended Reach Hedge Trimmer