Re: {Chrysler 300} Lead additive

[Dyke Ridgley <ridgleyracing65@xxxxxxxxx>]

Any street driven engine that has used leaded fuel for a few thousand miles can operate safely on unleaded fuel for the rest of its life or until it receives a valve job. The residual lead on the valve seats provides plenty of protection.

On Tuesday, January 6, 2026 at 6:45:02 PM UTC-6 ryan_hillc300 wrote:

Agreed, with the amount of miles most of us put on our cars unleaded fuel really shouldn’t be a problem in terms of valve seats. 

Ryan Hill

On Jan 6, 2026, at 4:36 PM, dplo...@xxxxxxxxxxxxxxxxxxxxxxxxx wrote:

You may drive it around the world and back with no lead and no problem. Does Noel use lead in his F? 

 

 

Daniel D. Plotkin

Daniel Plotkin & Associates LLC

54 Capri Drive

East Longmeadow, Massachusetts 01028

413 237 9629

dplo...@xxxxxxxxxxxxxxxxxxxxxxxxx

 

 

 

 

 

 

-----Original Message-----
From: "'Richard McFarland' via Chrysler 300 Club International" <chrysler-300-cl...@xxxxxxxxxxxxxxxx>
Sent: Tuesday, January 6, 2026 7:20pm
To: "Club International Chrysler" <chrysler-300-cl...@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} Lead additive

Don’t want to start a big back and forth but I have one of “ those” questions. I have a 63 non letter 383. I have been running a lead additive as I’m not sure if Chrysler was using hardened valve seats in 63. I have heard yes and no. It’s kind of a pain and getting expensive as I do drive the car quite a bit. Some of you gurus: do I need to run the lead additive? It has 93,000 original miles and never been out of the car.
Thanks
Sent from my iPad

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