What grade fuel do you use? - Harley Davidson Street Forum - Street 500 and 750
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post #1 of 12 Old 06-20-2016, 12:17 PM Thread Starter
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What grade fuel do you use?

Up until recently I've used only 93 as recommended by the dealer. However I went on a longer trip and a station I stopped at had 89 without ethanol, so I tried it. Once that was out I tried 87 and have used it since.

For some reason I find that my bike is running smoother on 87 and does not have any starting issues where before it would stall out when starting for the first time. Also popping on decel has gone down substantially. Any ideas as why a lower grade fuel would work better?

I checked the manual and it just says that minimum grade is 87.


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post #2 of 12 Old 06-20-2016, 01:12 PM
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I used highest grade, usually has more additives in it. Yes, it cost more; but it takes so little I don't worry about it. Bike runs fantastic.
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post #3 of 12 Old 06-20-2016, 05:57 PM
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I have 1700 miles since new & have run only 91 non-oxy. Its what I run in everything but my cars. A good resource is Ethanol-free gas stations in the U.S. and Canada
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post #4 of 12 Old 06-20-2016, 06:58 PM
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I have some Mods to mine. Fire Brand Grand Prix muffler, K&N Drop In, FP3, NGK Iridium plugs, Accel Coil and Sumax 8mm wires. Normally I run 87. Runs fine. Recently put some 92-93 octane in it. To see if it runs any different?? Havent gone on any long rides. Just to work. Which is 5 1/2 miles from where I live. Each way.

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post #5 of 12 Old 06-21-2016, 01:10 AM
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mid-grade 95 octane. my no-ecu, carbuerated bikes get 97 octane due to how easily cheapo fuel gums up their carbs

back in USA, i put whatever was premium (91/93 octane) in my V-Rod, which with its 5gallon tank, i never spent more than $20 to fill it up

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post #6 of 12 Old 06-21-2016, 01:50 AM
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Been using mid level 89 octane w/ Ethanol without any problems.
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post #7 of 12 Old 06-21-2016, 03:15 AM
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I have always used 95 octane with no problems, averaging 54mpg (or 23 km/l) since new.

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post #8 of 12 Old 06-21-2016, 11:49 PM
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You can probably get away with using lower octane fuel, imo though stick with manufacturer recommendations. I ain't an expert but I wouldn't want my bike to start sputtering or dying out on me because I'm too cheap to spend an extra few cents on 3 gallons of gas for my bike.
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post #9 of 12 Old 06-22-2016, 11:58 AM Thread Starter
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Originally Posted by lubbenpat View Post
You can probably get away with using lower octane fuel, imo though stick with manufacturer recommendations. I ain't an expert but I wouldn't want my bike to start sputtering or dying out on me because I'm too cheap to spend an extra few cents on 3 gallons of gas for my bike.


The manual states 87 or higher. I'm just finding I'm getting better performance using 87, possibly because all the higher grade gas in my area is full of additives. There's an ethanol free 89 down the road I might try out for a bit and see how it runs.

It's not a money issue considering I'm only spending ~$7-$8 for 100 miles of mostly city riding.


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post #10 of 12 Old 06-22-2016, 08:58 PM
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I might try switching down to 87 and see how it affects my mileage. I would probably have to go pretty far to find non ethanol gas near me.
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