Hi guys, I have a 96 CBR900 which I have always run on Caltex 95 (Except for the time I was forced to use an Independent and had nothing but dramas) with no issues. Anyways yesterday I ran the tank empty on a run to see what range I now get and the closest servo to me gave me an option of E10 or 98..... there was no way I was using E10 so I filled with 98. After a few minutes I noticed it was popping and crackling out the exhaust on downshifts way more than usual and when I arrived at my destination I could smell a strong whiff of unburnt fuel. Same thing happened on my return home but when I opened up the throttle on the motorway it missed and farted til I backed off. Now I'm assuming the higher octane fuel is no good for my older engine? I checked the handbook (so happens they contain a wealth of useful info lol) and it says to use 91 or above. Now I've drained the tank and was wondering do I try 91 or just keep using Caltex 95? I haven't run 91 in anything for years and just assumed it all (sneakily) contains ethanol now so can anyone make a recommendation on 91 fuel?