ravidrabbit

ok I need to know if there would be any adverse affects if I was to start usinf light leaded 100 octane in my 86. Im sure that being as it is avaiton fuel that it is of premium quality and all I would have to do is add a little lucas or techron every 5 tanks or so. Any one habve and knowlage on this?

RussB

Bad idea. It's called low lead, but actually contains a fair amount of lead. Also, I forget the details, but octane ratings for aviation fuel are inflated relative to road fuel. So 100 octane av gas is less than 100 octane road gas.

It's illegal because (a) no road tax has been paid on it and (b) your car contains emissions equipment.

It'll trash your oxygen sensor (forcing your ECU to run in open loop mode, which'll destroy gas mileage) and catalytic convertor.

Av gas is formulated to burn in low compression engines that turn at fixed relatively low speeds (typically, 2200 RPM), with low piston speeds and slow burn times. In a relatively fast turning car engine, the fuel will still be burning when the exhaust valves open. Result: burned valves.

Av gas has a lower specific gravity (it's less dense) than road gas. Carbruetted street engines will run lean unless one installs bigger jets. I'm not sure how CIS injected street engines would behave.

Um, as air traffic controllers ask pilots, "What are your intentions?"


(Slightly off-topic: During a gas shortage I tried high octane av gas -- premixed with oil -- in a two-stroke single cylinder race bike and the piston promptly seized. I didn't know that I needed to use richer jets.)

audiqv8

The leaded gas will destroy you catalytic converter and your O2 sensor

It is also illegal to put aviation gas in a car because of state and federal taxes.