If it's having running issues it might be too late for ethanol free gas to fix it, may be worth a quick trip to your local small engine guy for a carb clean so it doesn't quit when you need it.
X2, I only use blue marine stabil and have for over a decade, never had to clean one carb. The station up in Monson sells non ethanol 90 and that's the only thing I run in the saw, mower, snowblower, etc.