I havent been able to tell the differnce.
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I dont have "hobbies" I'm developing a robust Post-Apocalyptic skill set....
http://www.excessivehoppyness.blogspot.com
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I find I get the best mpg from 87. The higher octanes MIGHT give a tad better response, but generally poorer mileage. No use in the extra octane points if the engine hasn't been modified to take advantage of it.2006 Katana 750 - Daily therapy
2005 ZZR1200 - Weekend therapy
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I'm inclined not to recommend above 87 Octane either.
But, I have noted how the engine starts to run a little rough above 10,000' altitude. I think (??) it is running rich (too little oxygen), but I'm not clear on this. And maybe switching the gas octane won't do anything, the bike needs rejetted to run in the rare air (??). I know the higher the octane the LESS volatile, ie burns at higher temps, ie requires a hotter spark, and I know that things like butane lighters stop working at the higher altitudes for this reason.
...So, should I run a lower octane gas if I'm going into the higher altitude? or higher octane?
I've asked this question to many people before and I've got gotten all three answers (run higher octane, run lower octane, octane doesn't matter but you need to rejet). So if anyone actually KNOWS, please tell this confused soul.
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You should run what your owners manual says to run, on a Kat it should be 87 octane. Anything else and you are wasting money. Also, running higher octane will probably cause carbon build ups on a lower compression motor. The higher compression motors are the only ones that need 91+ octane.
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Originally posted by fourunner View PostIf you can find it 87 octane clear gas works really well. Im just under 1000 miles on my 2006 600 and it runs rough on 87 pump gas.
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