The marinas almost all sell 89 octane and, to me, that seems to match up as a manufacturer's recommendation since they sell boats as well as gas. What's amazing on
www.Winnigas.com is the huge price spread for an undifferentiated product. MVYC sells to members and the public, with a member discount. Not clear if the posted price of $4.29 is a public price or a member price. Do others do this discounting?
The earlier discussion focused on 87 octane (trailers) vs 93 Octane (Premium). Most smaller lakes do not have marinas and gas docks. What octane are these folks using, since there are several choices if you buy on the roadside?