E15 Gasoline - Harley Davidson Street Forum - Street 500 and 750
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post #1 of 5 Old 06-02-2019, 10:16 PM Thread Starter
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E15 Gasoline

E15, not E85, has anyone used this in their 500 Street? I wanted to use premium, but the guy that sold me my bike said unleaded was fine. What do ya'll use?

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post #2 of 5 Old 06-02-2019, 10:21 PM
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When i had mine the dealer told me to only run premium
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post #3 of 5 Old 06-03-2019, 03:45 AM
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I run unleaded 95 octane which is the highest petrol grade in our area.

2015 Street 750 Vivid Black
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post #4 of 5 Old 06-05-2019, 09:20 AM
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Originally Posted by gregamart View Post
E15, not E85, has anyone used this in their 500 Street? I wanted to use premium, but the guy that sold me my bike said unleaded was fine. What do ya'll use?

Your Street will run better on 87 octane (US system) It is a lower compression engine . 91 or higher octane is Not better fuel. Different burn points. As for 10% blend fuel it makes no real difference other than Blended will produce a little less fuel mileage. The so called pure gas 91 octane will work fine but will not burn as well cold in you Street engine. Pure gas or blended Has nothing to do with Octane.
91 or 87 octane no one is better than the other except for what engine it is run in. Compression is the only thing that makes a difference in what is best for your ride.
No one sells unleaded fuel anymore long sense gone from the market.
It is time we had a good thread on Fuel Octane the two different systems used to rate it, Why it madders or don't. Then the different issues of blend fuels the differences and why it madders and don't.
The history of Blend fuels and why what was true in the 70's is not any more.

Last edited by smitty901; 06-05-2019 at 09:29 AM.
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post #5 of 5 Old 06-06-2019, 09:02 PM Thread Starter
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Thanks

Based on what I've read, I'm just going to stick with 87 and use my SeaFoam on occassion.
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