Howdy all, I've been trying both normal 91 unleaded and BP Ultimate 98 and there doesn't seem to be any difference between the two. The bike seems to runs great on both. Would I be better off sticking to the BP Ultimate or other higher octane fuel (Caltex Vortex 98 for example) or will 91 do the job fine? I don't mind spending the $$ on the higher octane fuel if it means it's better for the bike in the long run. I will buy whichever is better suited to the bike. Your thoughts? Thanks!