Lead Fuel Additives

[Damcanadian]

I just got a 1969 Plymouth Roadrunner 383. People keep saying that I need to add a lead additive to the fuel. Does anyone add this to the fuel?

 

[GetX'd]

I add fast-gas to my 440. Google their website for details.

 

[Cornpatch MO]

I just got a 1969 Plymouth Roadrunner 383. People keep saying that I need to add a lead additive to the fuel. Does anyone add this to the fuel?

I wonder about lead additives. Is it a waste of money and how do we know if it is working ? It takes a lot of miles to find out if it does or not 1 ......MO

 

[mightymopar]

I've always added it in mine. Just didn't want to take the chance that it really is needed and didn't add it. Folks say if you have hardened valve seats it is not necessary, but don't know how to tell that. Guess I'll keep adding it.

 

[slepr1]

I add fast-gas to my 440. Google their website for details.

Tried googling them and no can find

 

[Seventy]

Its cheap insurance to protect seats IMO. this is a great buy, case of 12 for under 40 comes to just over $3 a bottle.
http://www.amazon.com/Motor-Medic-G...&qid=1444491621&sr=8-1&keywords=lead+additive

Dodge heads like the 906's for example have decent valves and seats, compared to the old lead chevy and ford motors, in them I used to run the lead and some marvels. But I dont have any soft seat motors anymore, the dodges are the only ones I dont do hardened seats in, to me its not worth it and I would rather have them without and add the lead..

 

[Moparsmitty]

I've been using 4oz. of Marvel Mystery Oil per tank in my 440 for 15+ years. Runs quiet and has like new compression numbers.

 

[Bigal75]

Is this for the seats in the heads? If so with the amount of driving we do they will be fine without any lead.