beating a dead horse GAS question
#1
07-16-2007, 08:16 AM
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beating a dead horse GAS question
would running the high octane gas cause the bike to runa rich or lean condition and make the exhaust tip(the carbon build up on the inside of the tip) a grey brown color?
and 87 or 89 octane? some of the stations around here use the 10%ethonal in the gas, any ill effects from that?
and 87 or 89 octane? some of the stations around here use the 10%ethonal in the gas, any ill effects from that?
#2
07-16-2007, 10:24 AM
RE: beating a dead horse GAS question
I've found that if i run premium (91 or 93), that it makes the exhaust smell more (and i assume produces more black residue on the exhaust) than if i ran a lower octane. These bikes are designed to run on regular (87), iirc...but i always run 89 just to be safe...premium is just wasting money and dirties up the exhaust.
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07-16-2007, 10:37 AM
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RE: beating a dead horse GAS question
ya once this tank gets low im going to pour in some sea foam and fill'er up with 89.
but anyone know if the 93octane would leave the grayish color build up on the tip?(the service guy at honda asked if i ran race gas in the bike,since thats common when race gas-im guessin 106octane- is used)
but anyone know if the 93octane would leave the grayish color build up on the tip?(the service guy at honda asked if i ran race gas in the bike,since thats common when race gas-im guessin 106octane- is used)
#4
07-16-2007, 05:37 PM
RE: beating a dead horse GAS question
To the post...
The higher grade gas you use, the less ethanol per measure is present...and the more fossil based chemicals, like oil, are present.
Despite people, "experts" in motrcycle forums, real chemical scientists recommend the highest grade fuel for power, lubrication, or at least non-drying qualities that lower octane in these ethanol days, gasoline has.
If you still are not sure, do the common sense thing, and get md-grade. (Usually 89 octane)
The higher grade gas you use, the less ethanol per measure is present...and the more fossil based chemicals, like oil, are present.
Despite people, "experts" in motrcycle forums, real chemical scientists recommend the highest grade fuel for power, lubrication, or at least non-drying qualities that lower octane in these ethanol days, gasoline has.
If you still are not sure, do the common sense thing, and get md-grade. (Usually 89 octane)
The American Motorcyclist Assn. is expressing concerns over ethanol's effect on motorcycle engines. Federal regulations currently cap the percentage of ethanol in gasoline at 10%, but Minnesota is asking the U.S. Environmental Protection Agency to allow double that amount in its fuel. The motorcyclist group fears that an EPA waiver would prompt other states to follow suit.
The problem with increased ethanol levels is that motorcycle engines are certified to run with only a 10% ethanol blend, the association stated in a July 3 news release. Ethanol burns hotter than conventional gasoline, so it runs the risk of damaging air-cooled motorcycle engines. It may also corrode fuel systems.
"The AMA supports the use of cleaner-burning fuels, but we are concerned about premature engine damage or failure while a bike is being ridden on a highway if the allowable level of ethanol is raised to 20%," said Imre Szauter, the group's legislative affairs specialist. "We are also concerned about any degradation in performance, fuel economy and rideability that may result from the long-term use of blended fuels with greater than 10% ethanol.
"Until studies show that a 20% ethanol blend won't damage motorcycle or ATV engines, and won't make motorcycles emit more nitrogen oxides than are allowed by the EPA, the AMA can't support the Minnesota proposal."
The problem with increased ethanol levels is that motorcycle engines are certified to run with only a 10% ethanol blend, the association stated in a July 3 news release. Ethanol burns hotter than conventional gasoline, so it runs the risk of damaging air-cooled motorcycle engines. It may also corrode fuel systems.
"The AMA supports the use of cleaner-burning fuels, but we are concerned about premature engine damage or failure while a bike is being ridden on a highway if the allowable level of ethanol is raised to 20%," said Imre Szauter, the group's legislative affairs specialist. "We are also concerned about any degradation in performance, fuel economy and rideability that may result from the long-term use of blended fuels with greater than 10% ethanol.
"Until studies show that a 20% ethanol blend won't damage motorcycle or ATV engines, and won't make motorcycles emit more nitrogen oxides than are allowed by the EPA, the AMA can't support the Minnesota proposal."
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07-16-2007, 08:43 PM
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07-16-2007, 11:32 PM
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07-17-2007, 05:37 AM
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RE: beating a dead horse GAS question
I believe the color or the residue is from the additives to the base gasoline.I don't think you can read an exhaust like a plug.Carbon is black, usually from inncomplete combustion, whether it is too rich or way too much octane.
Lower octane should give better MPG, it is easier to burn, All gasolines have the same energy content, it is the 'tune' of the motor that requires different octanes.
All this is contingent on the ethanol question brought up by BMG. He may be right, I believe there are dozens of formulations of gasoline in the U.S., maybe the ones near him have ETOH, I don't think the ones near me do. I think we are still using MTBE (meth-tert-butyl-ether) as the oxegenate (to aid in complete combustion, air quality thing).
I believe that 93 octane and 87 octane are derived from primarily different crudes or at least in different amounts from different crudes. After Cracking come distilation, I think at distillation you get different components to formulate different octane level gasolines.
As posted many times, unless your motor has a problem, such as 'hot spots' in the combustion chamber or 'build up' in the combustion chamber that raises compression, or has been modified, even by advancing the timing,use what the manual recommends. Anything else is really just a waste of money.
Lower octane should give better MPG, it is easier to burn, All gasolines have the same energy content, it is the 'tune' of the motor that requires different octanes.
All this is contingent on the ethanol question brought up by BMG. He may be right, I believe there are dozens of formulations of gasoline in the U.S., maybe the ones near him have ETOH, I don't think the ones near me do. I think we are still using MTBE (meth-tert-butyl-ether) as the oxegenate (to aid in complete combustion, air quality thing).
I believe that 93 octane and 87 octane are derived from primarily different crudes or at least in different amounts from different crudes. After Cracking come distilation, I think at distillation you get different components to formulate different octane level gasolines.
As posted many times, unless your motor has a problem, such as 'hot spots' in the combustion chamber or 'build up' in the combustion chamber that raises compression, or has been modified, even by advancing the timing,use what the manual recommends. Anything else is really just a waste of money.