I have a 30 year old (how did that happen!?) motorcycle. It's not a "sport" bike (UJC with good ergos) but it does have a high (10.5:1) compression engine (driv

I have a 30 year old (how did that happen!?) motorcycle. It's not a "sport" bike (UJC with good ergos) but it does have a high (10.5:1) compression engine (drive train is borrowed from a different bike by the same manufacturer, lower compression). (They should have upgraded some other things, like the clutch springs; we've all had to shim them at some point.) I remember when ethanol fuel came out. * I no longer needed to run premium in it unless it was really hot outside, plus was fine. * I actually get better highway mileage with the ethanol fuel. * It warms up better / faster when it's cold if I run regular.