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Discussion Starter #1
Another question to ponder.......has anyone seen a difference in gas mileage when using 87 octane or 91 octane ?
 

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If they have it's likely because they've been drinking it... ;)
Seriously, there's a lot of threads on octane. It has nothing to do with mileage, power, clean burning, emissions, etc, etc. It has to do with ignition temperature and timing, and unless you have pinging and knocking with the lower octane, switching to higher octane will not help whatever ails your bike.
Now, if the lower octane gas has more ethanol than the higher octane gas, that could affect gas mileage...
 

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On those rare occasions when I've used a higher octane I've not seen any appreciable difference in gas mileage. Only made me feel better, like I was giving the Wing a treat..
 

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Your profile shows a 1983 bike. I would be more worried about what ethanol laced gas would do than prem vs. reg.
I'm not sure bikes were designed for ethanol back then?
 
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