Fuel Treatments are kinda like opinions everyone has their favorite, the one they don't like, & the one(s) they'll use if in a jam.
I have used: Stabil, Sentry, Star-tron, seafoam, & valve tech. Haven't really noticed a difference w/ any of them. I use ethanol fuel during season because it's cheaper & non-ethanol (recreation or marine grade) in the off season since the boat will sit between uses.
I do however, use treatment with all the fuel that I put in the boat.