It's not either/or - it's BOTH. Fuel stabilizer and ethanol-free gas do two different things.
Ethanol is hydrophilic - it attracts water from the atmosphere. Vehicles that aren't driven daily need ethanol-free fuel.
Stabilizer keeps gas from going bad, ie losing its octane and turning to varnish. You need it if your gas isn't used up every few months.
I was in the wholesale petroleum business for 40 years.
