I know it's an endless debate, but before I realized the OM suggested 91, I was using the cheapest swill. Can't imagine there wasn't ethanol in it. Never got around to winterizing the scoot since I was working on it. Didn't gas up for three months. Started twice for oil/coolant changes. Forgot about it. Started up with no problems in the Spring, even with a non-tended battery.
Maybe some blends pair the ethanol with another additive that causes problems when left to sit? My tank is some sort of plastic and the Burger is fuel-injected.
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