Ethanol actually has less heat energy in it than gasoline. That means less power produced from it. Is it enough you would “feel” a difference, probably not but is what it is. The worst thing about ethanol is that it attracts water. Water in your fuel is never good.Stay away from ethanol gas in these high performance machines. It burns hotter and dryer than 91 octane gas. It can melt down an engine if run to much of it. Also I am not sure about what it does to plastic as 80 per ethanol is really hard on plastic. Its an excellent cleaner to. Have had trouble with oxygen sensors in the past and the dealer though it might be that there is ethanol in the gas up here in North Dakota.