110 octane
Road Master
Joined: Apr 2008
Posts: 992
Likes: 1
From: Mechanicsburg, PA
Be careful not to get it if it is leaded. Otherwise it shouldn't hurt at all.
Cruiser
Joined: May 2008
Posts: 218
Likes: 0
From: Detroit-ish
contrary to popular belief, octane rating dosent have anything to do with the quality rating of the gas, it is a measure of the temperature at which the fuel will combust. High performance racing engines require high octane to prevent pre-combustion (ping), because the run at higher temps. This is also why the air cooled V twin require "premium" fuel. Putting a higher octane fuel in your bike than what it says in the manual is just tossing even more money to the oil companies than you already are required to. sorry.....end rant......
Supporter
Joined: Jan 2007
Posts: 15,787
Likes: 5,615
From: along the shore of Mishigami
If you have an EFI bike with O2 sensors could present some problems. If you have an EFI w/o sensors it would run, but like mentioned earlier why run 110 thru your engine when 93 will be just fine?
Tourer
Joined: Dec 2008
Posts: 446
Likes: 0
From: Wilmington, NC
Yeah there will be very little if any benefit to running a higher octane rating than what you are tuned for. If you are pushing as much timing and compression as you can for a specific grade fuel you never want to go less due to detonation/knock, but going with the higher rating won't really help you.
Road Warrior
Joined: Dec 2008
Posts: 1,530
Likes: 1
From: Upstate, SC
The temperature of the combustion chamber can be a factor with fuel that has too low of an octane rating. Hot spots on the piston top, or even the heat of compression, can cause low octane fuel to pre-ignite.
One of the reasons diesel engines sound like they are pinging all the time is because they are. Diesel fuel is very low octane and combustion in a diesel engine is caused by the heat generated from the extremely high compression ratio. At near TDC, the compressed air charge reaches temps in excess of 1000 degrees, and at that point the fuel is injected, and BANG, combustion.
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Cruiser
Joined: May 2008
Posts: 218
Likes: 0
From: Detroit-ish
I also found this on the net:"The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine."
But my basic point is still true, it really has nothing to do with how clean, or how high a quality the gas is
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Tourer
Joined: Dec 2008
Posts: 446
Likes: 0
From: Wilmington, NC
heh, this is what I get for believing what dear old dad told me 20 years ago I also found this on the net:
"The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine."
But my basic point is still true, it really has nothing to do with how clean, or how high a quality the gas is
I also found this on the net:"The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine."
But my basic point is still true, it really has nothing to do with how clean, or how high a quality the gas is
knock is when combustion occurs too soon before TDC and actually attempts to force the piston in the wrong direction. For optimal power you want some ignition lead before the piston reaches TDC, but too much can be detrimental.
Last edited by Pepsimayn; Jan 25, 2009 at 08:42 PM. Reason: clarity
Outstanding HDF Member
Joined: Sep 2007
Posts: 3,352
Likes: 4
From: Augusta, GA
No, not at all.
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