lead additive for '67 383 2bbl?

[david42]

Hi all,

Just wondering if I should be using lead additive in my new '67 Monaco. As stated above, it has the 383 2-bbl engine, and it now has about 129,000 miles. The owner's manual says that the compression is 9.2 and requires regular fuel (in 1967, of course).

I've put in a few tanks of gas since I bought it (always 93 octane) and haven't had any issues so far. So, would the lead additive prevent problems down the road?

Thanks,
David

 

[polara71]

I never have

 

[Mr C]

Hardened exhaust valve seats arrived in 1972 for Chrysler engines. So, unless the heads have been off and upgraded, you will eventually cause damage without the additive.

 

[polara71]

But after how many miles? 150,000? Shes ready for a build by then anyway.

 

[commando1]

But after how many miles? 150,000? Shes ready for a build by then anyway.

HELLO!
Somebody got it!

 

[Mr C]

But after how many miles? 150,000? Shes ready for a build by then anyway.

Like I said...eventually. I imagine that point will be dependant on driving habits. If you go without he additive, just don't ***** and moan when it happens.

 

[polara71]

By then the seals are leaking, the chain has already been replaced and she smokes like a chimney, but I'd still *****

 

[Zymurgy]

This is good info for me. With my MGB I needed a valve job only after putting about 50,000 on the car, which is common for an MG. One was so bad that I had a O on a compression test for that cylinder.

I have been putting a lead substitute in it every time I filled up. Since it sat for 32 years, it never had anything in it but leaded gas. I currently have 63,000 on my '66, so most agree that I should expect any problems for many years, and by then I will be rebuilding the engine anyway.

 

[david42]

Like I said...eventually. I imagine that point will be dependant on driving habits. If you go without he additive, just don't ***** and moan when it happens.

Well, I don't want to lose my right to *****/moan, so that takes care of that. And at $5/tank, it's cheap insurance.

 

[cm23uoc]

Are there lead additives available on the US market or only lead substitutes like in Europe ?