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Old Jul 28, 2011 | 03:38 AM
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Whats better (if there is any difference at all) to use in the bikes?

91 octane with no ethanol

93 octane which may contain up to 10% ethanol

I have been filling up with the 91 but I see HD's going to the other station all the time.
 
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Old Jul 28, 2011 | 05:13 AM
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My choice would be the 91 octane 100% gas. It's not all about octane and either one has enough octane for street worthy compression ratios anyway. I have noticed 2 - 3 MPG improvement when using 100% gas. The whole ethanol thing just rubs me the wrong way. Be glad that you have a choice.
Captsluggo
 
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Old Jul 28, 2011 | 05:16 AM
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If I'm not mistaken the jury is still out on the damage to seals and o rings with ethanol over the long term. I go with 100% gasoline when I can get it.
 
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Old Jul 28, 2011 | 05:22 AM
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I work for a division of General Motors and I'm pretty sure virtually every car manufacturer adapted to ethanol a number of years back. It still causes some issues with seals, etc. in the earlier vehicles... talk of more than 10% certainly won't do anything good to most present engines. I would like to think HD adapted to the current standards a few years back. Now with that being said, I personally have NO use for anything in my gas BUT gas. Unfortunately, I know of no service facilities selling "straight" gas other than just regular grade. If non-ethanol were available around here in high octane, that would be my choice!
 
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Old Jul 28, 2011 | 05:22 AM
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As long as the Ethanol (grain alcohol) content isn't more than 10% - you're fine...even states in HD owner's manual. From your choices - I'd go w/93 octane...
 
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Old Jul 28, 2011 | 06:34 AM
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Straight gas for my bike...if possible.
I like Shell gas and I can get 93 Octane without ethanol close to home, at least that's what the label says (doesn't say "contains 10% Ethanol")
 
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Old Jul 28, 2011 | 06:58 AM
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There are no service stations with ethanol in my area that I'm aware of. I have found that 93 octane yields the best fuel mileage but the cost increase doesn't justify the difference. I've used Shell and found that my scoot does run as well with the nitrogen enriched fuel. My Harley has been getting terrible fuel mileage in this extremely hot weather we've been having. I’ve talked to guys that say Shell is the best fuel they have ever used. Go figure!

I just want it to cool down a bit.
 
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Old Jul 28, 2011 | 07:28 AM
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Try this web site for gas stations with no ethanol gas.
pure-gas.org
Tom
 
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Old Jul 28, 2011 | 08:36 AM
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Originally Posted by Challenger
Whats better (if there is any difference at all) to use in the bikes?

91 octane with no ethanol

93 octane which may contain up to 10% ethanol

I have been filling up with the 91 but I see HD's going to the other station all the time.
Both my current bike and my last ('06 Dyna) preferred the 93 with ethanol vs. the 91 without. Definitely runs smoother.
 
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Old Jul 28, 2011 | 08:53 AM
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Now that NASCAR is using Ethanol blend this year, the Crew Chiefs have to schedule more frequent pit stops than previously. Milage dropped from 4.5 mpg to 4 mpg, (if what they showed a couple of weeks ago is accurate.)

We shouldn't be any different. Ethanol decreases milage apparently.
 
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