Mixing it with half pump gas. I don't have any cats so having them plug is no concern. Just wondering if is safe for the engine.

 

Aviation gas is 100 octane with small amounts of lead in it. 100LL. If it were my car i would not put AV Gas in it.

 

A friend of mine is a pilot and he said that aviation gas has alot of lead. People always said that it didn't lubricate very well but he says just the opposite. What does the lead do to an engine?

 

lead helps lubricate the few places that oil doesn't really get to, like valve guides. However, all newer motors are made so they don't need lead anymore. The biggest reason to not use leaded gas in a modern motor is lead will ruin the O2 sensor, which will make your car run like ****.

 

Airplanes are still allowed to use leaded gasoline. I typed the last statement wrong. Octane ratings of 100 or more are commonly used in super-high-performance piston airplane engines. In the case of AV Gas, 100 is the gasolines performance rating, not the actual octane in the gas. It probably wouldnt hurt your car but i wouldnt put in in mine. I only use it in my Barron 55, Plus the gas is very expensive!

 

The root of the question is why do you think you need AV gas? There are other places to get 100+ octane but again why do you think you need it? It won't improve your power or mileage on a stock or even highly modified engine unless the CR is higher than 12:1 its a total waste. People equate octane with power when that is NOT the case.

 

Biggest drawback with any leaded gasoline is that is coats the o2 sensor making it "lazy". If you have a 3 wire heated o2 though you can run leaded for a little while without much of an ill effect.

 

Are you looking for a performance gain running the AV gas? If so look elsewhere as it will provide no benefit in your cammed LS1.

 

I would not exatly recommend Av Gas, because of the 100 LL (Low Lead) content. The lead is there as an Anti-knock, and your engine does not need lead. On airplanes you can lean the engine out and run it hot to burn the lead off, but it would be difficult on a Automobile engine. if you can get 100 av gas (green by color) that would work fine, but it may be a little expensive. Av Gas runs at 4.75/gal down here in Melbourne, FL.

 

Lower specific gravity on the av. fuel will mean running a little leaner then on regular non-av. fuel.

 

I was wondering if someone brought this up

 

I'm not going to run this often. I buy this for my race atv and had about 3 gallons left over so i just put it in the ta just to see how it would run. I don't think it will cause any problems since it is mixed. Like I said before, this is just a one time thing. I filled my atv up and had some left so i just got curious.

 

right, because it's made for high altitude where oxygen is not as dense.

 

What kinda ATV?

 

It's a Suzuki 250 quadracer. I have it bored .080 with cylinder porting and the head has been milled. Also run the carbon fiber Vforce reed cage and reeds with a 38mm Mikuni Flatslide with clamp on K&n. And an FMF pipe and silencer. I mix the AV gas 50/50 with pump gas with Castor 927 oil. Been running it this way for about 4 years and still runs as good as the day i put her togethor.

 

not sure about this but, I think AV gas will melt or brittle piston rings. putting oil i it for ATV is ok cause ATV needs oil. rings! well, I dont think its a good idea. if you do use it then keep us posted on results.

 

So if someone runs open loop and no NBO2 sensors full time, there's not really any ill effects of running leaded gasoline?

 

i wonder what the LONG TERM effects of leaded gas on fuel injectors is.... but otherwise... no.

no ill effects... and no performance gain.

 

im surprised no1 has mention that AV gas burns hotter then fuel made for car engines. Its not really that good to run AV gas in your car

 

3 gallons of 100 LL is not going to hurt your car. It should be blue and it does have a high lead content. Dump it in there and run it. You probably won't notice any difference. The only way I can see you gaining power is if your car normally has to pull timing or knock retard and this new octaine level helps that. I'd put it in my Corvette.