Now guys don't laff. I'm not try to make my truck fly like a plane. But I was wondering if any of you have ever put avaiation fuel in your truck tank. Hold on ! The reason I thought about it is,I built old trucks from the ground up. And sometimes its take a while. Using regular gas in the tank, it goes bad as you know. I just thought I could use something diffrent. I don't mean filling the tank. Maybe 5 gallons or so. Or is there another type gas I can use. I think the problem is regular gas has to much oil in it. By the way the motor I'm currently have in the truck is a modified 460 EFI. Bored 60 over,balanced,and a higher lift cam.
THANKS !!! Happy Hollidays :-X12

 

Too much oil in regular gas? Never heard of that before.

If your just looking to extend the life of the fuel while you're working on the truck, why not add in some fuel stabilizer. Many brands available, sta-bil, etc... Unless it's going to be in there for a year or more, I think that would do the trick.

 

There is no oil in gas (oil will increase detonation). As mrwizard suggested use a fuel stabilizer sold at most auto parts stores and also alot of discount stores. I use a mix of aviation gas in my race car with no ill effects and at $2.60 a gallon it's a lot cheaper than $7.00 gallon race fuel. You can not run aviation fuel with a catalytic converter since the 100 octane fuel contains lead. Deen

 

In almost any street engine, high octane aviation fuel like 100LL will usually give you less power and mileage than auto gas will. In 29 words or less, it burns too slow.

And there is no lubricant in gasoline. Gasoline is a solvent. There are lubricants added to diesel fuel, though. Maybe that's what you're thinking of.

 

Avgas has antifreeze in it for high altitudes. I don't know if it will last any longer than gasoline though.

 

[updated:LAST EDITED ON 24-Dec-02 AT 07:41 AM (EST)] When I was a kid we used to go to the local airport and buy a few gallons of aviation feul and put in my car to go cruisin on friday nights.

4 gallons of av-gas and a half tank of regular, and my little 73 AMC Gremlin 258ci six cylinder would be breathin fire and burnin the tires off.

 

I am also building a modded efi460.I would strongly advise against using 100LL in your truck unless your cats have been removed.There is a lot of lead in 100 low lead and unless you have a high compression engine it's just a waste. It will store forever and a day tho- great for 2 strokes.
check out http://www.tweecer.com/ for modding a mustang mass air sefi computer for your truck.

 

I use it sometimes in my truck, but only because I get the occasional 55gallon drum of it for FREE & thats a price that hard to beat.
It makes it slightly harder to start from cold, it does NOT increase the power at all, the only difference is that it will run a bit smoother.
The only major upside that I can think of it the reaction ya get from people who get a car full of Avgas exhaust fumes from the side exit pipes on my dually.... The only thing is does to my bike is turn the inside of the muffler white....

 

"I use it sometimes in my truck, but only because I get the occasional 55gallon drum of it for FREE & thats a price that hard to beat.
It makes it slightly harder to start from cold, it does NOT increase the power at all, the only difference is that it will run a bit smoother.
The only major upside that I can think of it the reaction ya get from people who get a car full of Avgas exhaust fumes from the side exit pipes on my dually.... The only thing is does to my bike is turn the inside of the muffler white.... "




Ok been told aviation fuel and race fuel close if not same thing.... u can't fill a normal gas engine with all aviation fuel if u do then your goona see your engine take flight you WILL blow er sky high... aviation fuel burns ALOT hotter/faster then normal 87-91 octane fuel mixing it takes great care it can be worse than running your engine on the bottle... put it this way herd of ither (sp) while running squirt that in your breather your engine will increase in rpm quickly its close to the same thing and does just about the same thing...

so unless want to spend lotsa $$ run it lean very lean

 

Pure aviation fuel contains a lot of lead which is the main means of raising octane. This lead has a tendency to foul plugs at lower cylinder pressures which is why airplanes run dual plugs, this is especially so when taxiing around. Also the lead and associated chemicals to suspend the lead are known to foul/ corrode valve faces and seats. Fact be known, airplanes run more automotive fuel than aviation fuel, and in fact when it is used it is mixed in.

Racing fuels use chemicals such as MMT, Toluene, Xylene, etc to increase octane. Pure gasoline (iso-octane) has a octane of 100. Petrolium manufacturers add other cheaper chemicals o lower the price of gasoline, and also the octane.

Running higher fuel than what is required will give you no performance gains. It may actually reduce power, and will cause harder starting. It is acceptabe to have occasional lite knock, but heave long periods of knock is bad of course.

Just a few thought from someone who has studied this stuff. Just dont like seeing people waste their money thats all.

Nick from the frozen north
1974 F-250 4X4
soon to be 429
dana 60 front and rear

 

> aviation fuel burns ALOT hotter/faster then normal 87-91 octane


If aviation fuel is 100 octane, then it will burn slower than 87-91 octane, not faster

86 F250 4x4,4.10 gears,4 speed, 10.25 rear, dana 50, 460, weiand stealth, edelbrock 750, heddman headers, 36" super swampers

 

The only thing I have ever heard bad about av gas is that it is very dry and hard on your rings/cylinder walls. A guy who used to race a truck back home said that he would mix a bottle of marvel mystery oil in every tank. Higher octane doesn't always indicate that it burns slower (in pump gas it does) just that it resists heat detonation to a higher degree. It could still have a bigger "bang" than regular gas but I have never heard this. I definitely don't see where it is worse than nitrous. That seems a little off to me. It sure doesn't make more power.

 

One year I had a local fuel supplier for a sponsor on my race car. He gave me a barrel of 110LL avgas to use. It made no difference whatsoever in the way the car ran. It's not worth the money unless you have really high compression and need the extra octane.

 

[updated:LAST EDITED ON 25-Dec-02 AT 03:59 AM (EST)]Octane has NOTHING to do with flame speed. Octane is simply a rating for resistance to knock. A lab uses a variable compression ratio test engine to test the knock limits of fuels.

Avgas will also by no means dry out your rings or valves. Gasoline is not a lubricant, it is a solvent. It will quench heat away just like gasoline does. Propane is a true dry fuel, and engines will run 50% longer on it before teardown than gasoline engines.

Avgas will NOT add additional power. The only fuels that add power are oxygenated fuels such as alcohols like methanol. The major down side to running alcohol is that you need to burn it at ratios around 6:1 if I recall corectly, which means huge fuel consumption. This is why alcohol cars will guzzle 5-20 gallons per pass.



Nick from the frozen north
1974 F-250 4X4
soon to be 429
dana 60 front and rear