fuel grade? - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
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post #1 of 28 (permalink) Old 05-24-2012, 08:33 PM Thread Starter
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fuel grade?

i was wonder yall opinion.i started putting 93 octane gas in my bike last week.it seems to be running better and smoother.i do have a dynojet kit with 155 mains and 37.5 pilot.i know our bikes call for 87 but they run lean stock.so,with the bigger jets would that change the grade i could use?i mean the higher grade would lean out the mixture alittle so it could help?i can tell a big difference in power and its getting better mpg so why not use it.

live life one ride at a time.2002 vl800
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post #2 of 28 (permalink) Old 05-24-2012, 08:47 PM
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Octane is the rating of how well a fuel resists pre-ignition... The primary reason for use of higher octane fuel is in an engine with higher compression. Your engine doesn't meet that criteria. You are spending money you don't need to spend. As a matter of fact, I belong to a forum for Victory bikes which do require 91 or better (per the manual) and one of the guys on there is a Vic mechanic... He recommends not burning anything higher than necessary to prevent pinging and knocking, and not run higher octane if you can safely do it, simply because of the slower burning premium can actually cause some carbon buildup. He has seen some bike engines torn down that they determined that the cause was running high octane in an engine that didn't require it. I'm sure someone will come along and say I'm full of it, but everything I've said can be supported by some stuff on the web from the American Petroleum institute... So for what it's worth, I'd save the difference in cost and just run non-ethanol regular....

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post #3 of 28 (permalink) Old 05-24-2012, 08:53 PM Thread Starter
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well,its not that much more but actually my bike has alittle kinda rattle.not bad but its there and the higher octane helps alittle.like i said though it runs better with it.i had heard somewhere that the high octane leans the mixture out alittle.with the jets i have i think my bike is running alittle rich.so i wonder if thats why it runs better with the 93 vs the 87?

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post #4 of 28 (permalink) Old 05-24-2012, 08:54 PM Thread Starter
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oh and by the way i had heard the same thing you had siad about the carbon built up and stuff.

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post #5 of 28 (permalink) Old 05-24-2012, 08:57 PM
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Some of us don't have a choice to run non-ethnol, I wish I did. I run 87 in Vol and 93 in the Nomad. With our prices for gas it does make a difference, the Vol is my commuter.

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post #6 of 28 (permalink) Old 05-24-2012, 09:02 PM Thread Starter
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yeah and its non ethanol

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post #7 of 28 (permalink) Old 05-25-2012, 06:14 AM
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I agree with Dcat, My bie runs like crap on 87 a little better on mid and the best on 91, In fact on 87 it shakes so bad that I thought there was something wrong at one point and it pings like a #$%^ on 87 as well so I run high octane.... screw it!!

I also get better mpg on the pricey stuff

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post #8 of 28 (permalink) Old 05-25-2012, 07:55 AM
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Blue doesn't like 87. She runs a lot better on 93 and I get better MPG as well. I don't know if the ethonal has any effect on it or if it is a combination of ethanol, seafoam, and higher octane that makes her happy, but she definately lets me know when she has "gas".
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post #9 of 28 (permalink) Old 05-25-2012, 08:04 AM
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Quote:
Originally Posted by dcat-1831 View Post
i was wonder yall opinion.i started putting 93 octane gas in my bike last week.it seems to be running better and smoother.i do have a dynojet kit with 155 mains and 37.5 pilot.i know our bikes call for 87 but they run lean stock.so,with the bigger jets would that change the grade i could use?i mean the higher grade would lean out the mixture alittle so it could help?i can tell a big difference in power and its getting better mpg so why not use it.
I only run 93 or 91 octane in my Boulevard. The bike runs way smoother. In fact, just the other day I had a brain fart and put in 87 Octane. The vibration on the highway was simply unacceptable to me. Way smoother with higher octane and to me that is by far the most important thing.
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post #10 of 28 (permalink) Old 05-25-2012, 08:07 AM
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Originally Posted by grunt69 View Post
Blue doesn't like 87. She runs a lot better on 93 and I get better MPG as well. I don't know if the ethonal has any effect on it or if it is a combination of ethanol, seafoam, and higher octane that makes her happy, but she definately lets me know when she has "gas".
I found the Mobil regular runs better than the rest, but I can't get it easily around here and I'm sure if there was no ethanol in the bike, it would run better on 87, but that's just not possible around here. I have tried every possible combination of octane and companies. Best with higher octane.
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