what octane gas does everyone use? i was using the 94 until my buddy said try the 87 because he was getting better fuel mileage on his heritage. tried the cheap stuff and low and behold i have run 130 miles and still have a quarter tank left.
no lie i only got about 120 miles ona tank ofhigher octane. anybody else have better fuel mileage like this? does harley recommend a certain octane level?

 

I believe HD recommends 91 octane or higher for fuel.

 

I just use the best I can get, usually 93. I figure its better because I tend to use the lower end of the power band more often than the upper, and higher manifold pressures with low RPM's is an invitaion to preignition or detination problems with lower grade fuels.

 

Since I get 40 plus MPG I use nothing but the best....For me it's Chevron hightest

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Always the highest I can find. 94 or 91 usually.

Cheers!
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Higher the better

 

Running higher than needed octane is a waste of $$. It doesn't burn cleaner, make more power, or do anything special. Lots of guys running stock compressionuse lower grades and report better mileage and a smidge more power.

 

Harley does recomend 92 or higher

 

My Evo runs just fine on 87 octane.

MikeyB

 

I use super, for the extra .20 per gallon, I can aford the extra buck it may cost to fill it.