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Old 12-06-2011, 03:09 PM   #61
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Quote:
Originally Posted by po-po 5.0 View Post
You're still incorrect on a fuel having a higher percentage of ethanol. The max is 10%.
Never said there was more than 10% ethanol. I said that lower octane fuels usually have a higher percentage of ethanol, as in 87 octane will usually have the maximum 10%, but that 93 octane may only have 5%. Gasoline can be refined to have higher octane ratings without additives (ethanol, TEL, MTBE, ETBE), it's just more expensive to do so.
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Old 12-06-2011, 03:18 PM   #62
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^ ethanol in fuel is also heaviliy subsidized by the gov. if gov wasn't invovled, we'd likely have ethanol free fuel still.
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Old 12-06-2011, 03:31 PM   #63
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Useful Links:

Cheap Ethanol Content Test

http://continuouswave.com/whaler/ref...hanolTest.html

List of Ethanol-Free Gas Stations in Texas

http://www.pure-gas.org/index.jsp?stateprov=TX
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Old 12-06-2011, 03:31 PM   #64
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Okay, I'd say the octane discussion is done.

What kind of oil should we be using in our bikes??
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Old 12-06-2011, 03:33 PM   #65
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Sent eMail to shell to see what they say about this. Will post a reply if Iget one.
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Old 12-06-2011, 03:44 PM   #66
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Quote:
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Okay, I'd say the octane discussion is done.

What kind of oil should we be using in our bikes??
Delo 400.
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Old 12-06-2011, 03:47 PM   #67
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Sent eMail to shell to see what they say about this. Will post a reply if Iget one.
Sweet. My guess is that they will claim to have a lower ethanol content in their higher octane gasolines, while Valero has the max (if not more) in all grades. Valero is the largest producer of ethanol in the U.S., btws. And yes...there is non-E85 gas out there with greater than 10% ethanol content.
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Old 12-06-2011, 03:48 PM   #68
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Quote:
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Okay, I'd say the octane discussion is done.

What kind of oil should we be using in our bikes??
canola
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Old 12-06-2011, 03:50 PM   #69
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MTBE is no longer legal for use in the US
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Old 12-06-2011, 04:14 PM   #70
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Quote:
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One of our most intelligent members wrote this some time ago.
If you have any questions about what octane is or what you should use, please read this thread before you embarrass yourself.
I retract the intelligent part. I forgot to add the link

http://www.motohouston.com/forums/sh...ht=octane+talk

Seriously there is a lot of well researched info in this thread and it explains the mysteries of "Octane".
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Old 12-06-2011, 04:27 PM   #71
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Quote:
Originally Posted by Gigolo Jason View Post
Higher octane is really only needed when running a pressurized engine, i.e. a turbo or a supercharger.

GJ
Nope - you're wrong.

Higher octanes are needed for higher compression engines. After about 9.5:1, it gets questionable about running anything other than 91 octane.

With that said, if you don't get pre-detonation (pinging) on your bike running 89 or 87 fuel, feel free to save a bit and buy the cheaper stuff.
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Old 12-06-2011, 04:37 PM   #72
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^ folks probably get away with lower octane fuel in high compression car motors due to knock sensors killing power.
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Old 12-06-2011, 04:40 PM   #73
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Quote:
Originally Posted by pinball View Post
Never said there was more than 10% ethanol. I said that lower octane fuels usually have a higher percentage of ethanol, as in 87 octane will usually have the maximum 10%, but that 93 octane may only have 5%. Gasoline can be refined to have higher octane ratings without additives (ethanol, TEL, MTBE, ETBE), it's just more expensive to do so.
Generally speaking, if they're going to put ethanol in a fuel, the put the maximum 10%. This idea that there's less ethanol in premium (93 octane for sake of argument) I think is strange, and I addressed this in my earlier post: because ethanol's octane is higher than that of even premium, it actually makes more sense to put more if it into premium than regular.
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Old 12-06-2011, 04:46 PM   #74
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I just know my manufacturer recomends 93 octane, and I want my baby girl to feel healthy at all times, so that's what I give her
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Old 12-06-2011, 04:49 PM   #75
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Quote:
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MTBE is no longer legal for use in the US
You sure about that? I know TEL is illegal, but I didn't think MTBE was banned everywhere yet.
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Old 12-06-2011, 04:53 PM   #76
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Quote:
Originally Posted by pinball View Post
Sweet. My guess is that they will claim to have a lower ethanol content in their higher octane gasolines, while Valero has the max (if not more) in all grades. Valero is the largest producer of ethanol in the U.S., btws. And yes...there is non-E85 gas out there with greater than 10% ethanol content.
I also consistently get the lowest MPG out of Valero gas other than Murphy. I always keep an eye on it. My results ate typically .4 mpg less from Valero gas. Exxon is proving to be the best MPG in my testing. I have been watching it for years now.
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Old 12-06-2011, 06:00 PM   #77
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Quote:
Originally Posted by 675Raisinator View Post
MTBE is no longer legal for use in the US
wrong.... it is illegal to be pumped.... but is still used in additives and race fuels. http://www.fuel-testers.com/mtbe_ethanol.html


MTBE is no longer allowed in gasoline dispensed at public gas pumps.


MTBE may still be found in the USA in gasoline additives and specialty racing fuels.


The heating value (energy) of MTBE is higher than ethanol, but less than petroleum gasoline.


The autoignition temperature of MTBE is higher than both ethanol and petroleum gasoline.
View chart of properties of all fuels at http://www.afdc.energy.gov/afdc/pdfs/fueltable.pdf


Currently ethanol and ETBE are the only gasoline additives used in the U.S.A. to oxygenate gasoline to decrease pollution and emissions.
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Old 12-06-2011, 06:06 PM   #78
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Quote:
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You should pretty much run the lowest octane fuel you can without pre-ignition or a drop in mileage, anyway. All the higher octane means is that the fuel can be put under higher pressure before it detonates without spark, which is why high compression engines usually require premium.
Bingo!
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Old 12-06-2011, 06:09 PM   #79
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here is the problem guys. your high revving bikes prolly run just fine running around town and commuting. start running the rev limiter at a track day and you better run high test. the conditions at 13,000 rpm are vastly different than at 5000rpm.
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Old 12-06-2011, 06:20 PM   #80
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Ok here's the deal guys...


I'm going home I'm tired of working. Enjoy your argument over $1.
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