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I purchased a 2015 Honda CB500F which as a compression ratio of 10.7:1. The manual says to use 91 RON or higher fuel. Is there any significant benefit in using 95/98 octane over 91 octane for my bike? I haven't been able to find out if my bikes compression ratio is high or low, which from my understanding helps determine whether to use 91 or 95/98. Thanks.


Hi there,
Usually for a standard vehicle, there is very little noticeable difference and any would often outweigh the extra cost per litre of fuel at the pump. All you could do is try a higher octane and see if you can notice a difference and also monitor fuel economy and see if there is a change.