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Jan 23rd, 2013
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Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13377476 12/19/19 08:08 PM
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JC Skeeter Offline
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Some are saying 89 for best performance but wouldn’t 93 be better? Since it’s the highest octane?

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Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13377490 12/19/19 08:32 PM
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Sinkey Offline
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I try to find "0" Ethanol first and/or highest grade at the pump.

Re: Yamaha 250 Sho fuel choice??? [Re: JC Skeeter] #13377540 12/19/19 09:15 PM
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Dubee Offline
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Originally Posted by JC Skeeter
Some are saying 89 for best performance but wouldn’t 93 be better? Since it’s the highest octane?

Running higher octane than the motor is built for doesn't help at all. Run what is recommended

Re: Yamaha 250 Sho fuel choice??? [Re: JC Skeeter] #13377547 12/19/19 09:19 PM
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Originally Posted by JC Skeeter
Some are saying 89 for best performance but wouldn’t 93 be better? Since it’s the highest octane?



The owner's manual says to use 89. I trust Yamaha and my dealer to know what is best for my motor. Not gonna experiment with a $20,000 motor.

Re: Yamaha 250 Sho fuel choice??? [Re: JC Skeeter] #13377554 12/19/19 09:27 PM
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01Lightning Offline
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Originally Posted by JC Skeeter
Some are saying 89 for best performance but wouldn’t 93 be better? Since it’s the highest octane?

Technically its not the highest octane flag


God bless. Semper Fi.
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13379648 12/22/19 02:16 PM
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Yamaha suggests nothing under 89 octane.

When they made this decision they sent their field technicians to a 2 day Texaco clinic on gasoline additives and ingredients. After completing the 2 day segment, many of those field technicians would not run anything other than 89 octane in their personal vehicles after the training. They indicated that 87 octane fuels were basically junk in a tank.


BCB
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13379740 12/22/19 04:29 PM
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rxkid2001 Offline
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I read minimum 89 but when I go to fork 87 is the best I can find ethanol free. You’d think the place that holds the biggest skeeter event would have proper gas for them to run on. I also add ring free and ethanol treatment to every tank.

Last edited by rxkid2001; 12/22/19 04:30 PM.
Re: Yamaha 250 Sho fuel choice??? [Re: rxkid2001] #13380345 12/23/19 12:27 AM
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David Burton Offline
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Originally Posted by rxkid2001
I read minimum 89 but when I go to fork 87 is the best I can find ethanol free. You’d think the place that holds the biggest skeeter event would have proper gas for them to run on. I also add ring free and ethanol treatment to every tank.

See, the manual doesn't say avoid Ethenol, in fact it says just the opposite, ethanol (no more than 10%) is fine. Now, we all know that is the corn lobby, but octane first, then deal with the ethanol second! Hell, If you run the gas through as much as I do mine, it really doesn't sit long enough to have any ethanol problems.


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Re: Yamaha 250 Sho fuel choice??? [Re: Dubee] #13380370 12/23/19 12:34 AM
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Originally Posted by Dubee
Originally Posted by JC Skeeter
Some are saying 89 for best performance but wouldn’t 93 be better? Since it’s the highest octane?

Running higher octane than the motor is built for doesn't help at all. Run what is recommended



Exactly.

Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13380409 12/23/19 12:48 AM
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I would trust what Mr. Pierce says above as well.

Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13381192 12/23/19 11:39 PM
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Detonation is term associated to octane ratings. If the engine is experiencing knock conditions the computer will retard spark timing thus reduce power and ultimately top end speed.

Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13381197 12/23/19 11:44 PM
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Three pages of opinions? It’s not really needed to debate the science of gas. Put in the tank what the manufacturer put in the owners manual. Simple. Less is an issue with the motor, more is an issue with your wallet and motor.


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Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13381219 12/24/19 12:05 AM
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Greg W Online Content
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During the winter, does the gas still have ethanol? I thought they only put in ethanol during the summer.

Re: Yamaha 250 Sho fuel choice??? [Re: Greg W] #13381290 12/24/19 01:43 AM
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David Burton Offline
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Originally Posted by Greg W
During the winter, does the gas still have ethanol? I thought they only put in ethanol during the summer.

Yes, the winter/summer blends have really nothing to do with ethanol content.


David Burton
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...and down goes PhotoBucket with the new Terms of Service... I predict they will be out of business or begging for forgiveness inside a month. 6/30/2017
Re: Yamaha 250 Sho fuel choice??? [Re: Greg W] #13381303 12/24/19 01:59 AM
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Dubee Offline
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Originally Posted by Greg W
During the winter, does the gas still have ethanol? I thought they only put in ethanol during the summer.

Really?

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