I have a Chevron a mile away where I get my 90 octane ethanol free gas from. Never had an issue with any of my equipment. It helps that it's a busy station and we are a coastal town with a huge population of boat owners , many of whom get their gas there too.
UPDATE to my above memo : I just bought my HRX2176VKA directly from Max Tool for $545.45 which included free shipping and no tax.