AMA Supersport Racer
Join Date: Feb 2008
Location: Tampa, Florida, USA
Thanked 3 Times in 3 Posts
Feedback Score: 2 reviews
[quote=chipmunkofdoom2;2370010]Anything above your recommended octane in the manual is a waste. quote]
True, but you have to remember that:
1. The manual says "86 OR HIGHER" octane
2. 03-06 have 12.5:1 compression. (there is a general rule, which I suspect may be true, that says if you move your compression decimal point over 1 digit to the right, you get your optimal octane rating, but i'm not sure if you can apply this to high revving bikes)
3. Our engines rotate at such high speeds (internally) that you're prolly not going to actually hear any detonation, especially when you also factor in the loudness of the bike itself. you could be detonating and not even know it.
I've been struggling with the octane question for a while now and I can't seem to find a definitive answer, but wouldn't you rather foul your plugs over a long period of time that destroy your internals?
your only saving pennies at the pump anyway.