Lead additive necessary ?

[rpatton3]

Has anybody ever used 100 low lead av gas? Crop dusters use this in piston engine planes.
I am sure this is not legal do on the street.

It should protect older engines with out hardened valve seats.

[HI Cobra]

I add 1 gallon of 110 avgas for every 10 gallons of premium - runs a whole
lot better.

[RICK LAKE]

BAsque1 Lou If you are running aluminum heads and about 10.5 compression or less, stay with what you have and don't worry about additives. The best way to check the motor when running is a A/F meter in the exhaust and they used to sell a knocks meter for pinging. If the timing and the mixture are not at 13.8 or higher, you are in the safe zone. If you search around on goggle ther should be a couple of Sunoco gas stations that sell 100 octane unleaded. I don't think you can get a set of new heads with them having harded valve seats anyway. See if there are any small race tracks in the area and buy a couple of gallons of fuel. We used to use in the old days 130 AV gas. Hemi ran great but learned that AV gas didn't have the lubercation qualities that automobiles gas had. You did get great fires out the tail pipes and backfires. Bottom line, run the motor a little soft. Watch your total timing. You should be fine. IF you like that nasty smell, add a 2 gallons of race fuel. Rick L. I have FI system switch is more flexable for running gas from 89-93 depending on where you are at in this country. Also have an aluminum motor with heads to help stop knocks. Iron heads would be a different story. Rick

[Jaydee]

LPG has octane level above 100. So I'm strongly considering going that way with my new Cobra. All the crap they are putting in petrol is worse for the environment anyway.
You can run higher compression. It's cleaner. Less oil changes. Cleaner plugs. no moving parts. No fuel pumps. No blocked carby jets or injectors. So far I've run all my cars and tuned for pure gas with no problems. It's redibly avalailable in Ozz. And at half the price. And with the right mixer and aircleaner it looks like a carby.
JD

[MRGEORGE077]

When I had a 67 Big Block Vette would go to the local airport and fill it up with
Avgas 100LL, Ran like a bat out of hell after that