Here's a pic of the swingarm sticker from Florida... With all honesty, Premium is just a more refind fuel. And for about $.75 difference per tank is it really a big deal? Not for me.Technically both are correct, on the swingarm it says 91 ron octane, which is the octane rating system used in the UK or probably everywhere else. Us Americans always like to be special and use the CLC octane rating system. The 91 octane rating is equivalent to 86 or whatever that we use here. Personally, I use 91 CLC.
Here is a nice tidbit on the explanation of octane ratings if you wanna read:
Octane Ratings
I don't use premium in my cager anynore,but back when it was new and I was pouding miles on that thing like car's were going out of fashion... I use premium because the car ran better, and I was getting a solid 50 miles more per tank in average. I haven't try to compare with the bike... but at 11ish:1 compresion ratio it just make me feel better to use premium...
Like I said, I don't want to start another fuel octane rating discution here... or oil & oil filter :surrender: