AV Gas
Road Warrior
Joined: Mar 2009
Posts: 1,837
Likes: 46
From: Macomb MI
We use avgas to winterize boats and for other long term storage. It has no ethanol and does not turn to varnish as it evaporates. We don't fill the tanks with it, but just run it through the fuel system. No known benefits for stock engines that are run on a regular basis. The guy who runs the airport says it makes air cooled engines run hot (temp. wise). ???
to take advantage of high octane gas you must have high compression engine and to run more timing.
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
A single tank won't hurt.... but I really wouldn't if you have O2 sensors.
You can fill up with avgas, as it does not varnish up. Regular gas does.
Higher octane fuel is harder to ignite. That's why if you are getting engine knock (pre-detonation), higher octane fuel takes care of it.
You can fill up with avgas, as it does not varnish up. Regular gas does.
Higher octane fuel is harder to ignite. That's why if you are getting engine knock (pre-detonation), higher octane fuel takes care of it.
Last edited by archergodwin; Jun 6, 2009 at 07:58 PM.
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Road Master
Joined: Oct 2007
Posts: 1,234
Likes: 0
From: Southern Indiana
One guy that runs it has an old Shovelhead. If it's leaded I'm sure it's a great gas for his valves. The other has an '07 96" and runs it on every fill up, the other an 88", I might step back and see what happens there.
Road Warrior
Joined: Mar 2009
Posts: 1,837
Likes: 46
From: Macomb MI
high octane burns slower
low octane burns faster and hotter.
that is why when you have spark knock you run high octane gas to stop the pre ignition in the combustion chamber.
Road Warrior
Joined: Mar 2009
Posts: 1,837
Likes: 46
From: Macomb MI
I have 10.5.1 pistons in my warrior and when was really hot out she spark knock on 93 pump gas but she run GREAT on that 100 leaded gas I ust to love to run that gas in my warrior,It was a lots of fun,and smell is lovely from the exhaust.
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
As was previously mentioned, if the '07 has a PCIII with O2 sensor replacements, then it won't really matter.
Stellar HDF Member
Joined: May 2005
Posts: 2,137
Likes: 17
From:
It might be great for valve seats but it's hell on spark plugs. Lead is corrosive. It's not good in any way for modern engines. And it wasn't that great for old ones. One of the reasons modern engines commonly run well over 100,000 miles with no major work is the lack of lead in gas.
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Road Master
Joined: Oct 2007
Posts: 1,234
Likes: 0
From: Southern Indiana
I normally dump Shell 93 in it, and every 4 or 5 fills ups drop some octane booster in. When I saw the octane rating on AV gas I was hooked. Now that I see it could be harmful I'll stick to my old method.
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Road Master
Joined: Oct 2007
Posts: 1,234
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From: Southern Indiana
He doesn't so I'm sure he'll jack it up eventually.
Road Master
Joined: Apr 2008
Posts: 992
Likes: 1
From: Mechanicsburg, PA
hold a sample up to something white. If it is light blue, it is 100LL (low lead)
don't be fooled by the "low" part. It has plenty, believe me. And don't waste your time with it. I have not even read the thread yet and I am sure you have been told a thousand times by now it won't help you. It could harm your o2 sensors as well if your bike has them.
don't be fooled by the "low" part. It has plenty, believe me. And don't waste your time with it. I have not even read the thread yet and I am sure you have been told a thousand times by now it won't help you. It could harm your o2 sensors as well if your bike has them.