Who would call best torque a torque reading that can not be sustained under normal operating conditions? Perhaps to see how quick you can lunch an engine? Why even consider a torque that isn't doable? It seems pointless to me other than see just what will destroy the engine. I have no interest in that. My point is that best torque can be found for any particular situation. Regular OR premium. My above 13 A/F ratio has plenty enough room to cover both because, even above 13, it is still not close enough to rule one out. That's my main point. The fact that our bikes run just fine with 10% ethanol demonstrates that our jetting is indeed a bit fat. If it wasn't already, the stuff would be melting engines right and left which it isn't. Maybe 15% will get our bike leaned out about right without rejetting? Thanks EPA? I think you mean the corporate farming lobby. Talk about corporate welfare. Ethanol mixed gas is a double whammy!