Lots of the places i ride to do not have premium fuel available, is adding octane booster to the fregular uel going to do anything or do i just keep looking for better fuel? Options? Maigashi As a side question, i live in Canada and the gas cap calls for 89 octane 87 is standard fuel here. (our fuel because of the way we calculate is better per rating than in the US) Is 89 the minimum or the recommended? Will 91 allow for full performance or is the mapping fine at 89?