In Mn we have had !0% ethanol for years and I have had good success with seafoam . Others with stabil, so I think they both work fine.
My solution has been siphon to near empty then seafoam it "thick" meaning higher ration then on can and run it through and let it sit. TIL SNOW!!!
Then next winter fill it up with fresh gas (all 10%ethanol) and figure I can not have more condensation than a gallon of ethanol can handle. Works for me like a charm on sleds, mowers, weed wackers chain saws and on on.
Yamadoo