Own a 1990-1991 motorcycle (own two actually, same model) which came from the factory with 10.5:1 compression (drive train from a different bike, they upped the

Own a 1990-1991 motorcycle (own two actually, same model) which came from the factory with 10.5:1 compression (drive train from a different bike, they upped the displacement slightly and that also contributed to the increased compression). In the winter it warms up faster on the cheap lower octane gas with ethanol (can't use it in the summer, can't use it for highway riding). On the highway it runs better / better mileage with higher octane gas with ethanol than without. YMMV (had to say that!)