I've been running 93 octane premium gas in both of my sleds religiously, knowing the manufacturer recommends at least 91. My concerns are....I don't really know how much ethanol is in the premium 93. I know from experience that ethanol wreaks all kinds of bad mojo with smaller engines,and would like to refrain from its use...which brings me to the question at hand. There are a few gas stations here that sell an ethanol free 90 octane "Recreational gas" (or "Rec gas"), just for your toys. Would this ethanol free gas be too low of an octane rating to safely burn an entire day on the trail?