higher octane is best but many people claim the addatives in super are breaking down the two stroke oil which is killing the motors.
im building everything to run on 2 star thats been in a can since 72 as im fed up with the hassle of it.
i may be wrong but im under the impression that 30bhp can be had from an rb225 with a low comp head so for road use im wondering whats the point in high comp anymore when better ways of getting power are out there.