unleaded gas

[alsant]

I know there`s an additive for the oil for older mopars (zddp).what about the leaded gas?can anyone chime in.Thanks Greg

 

[Propwash]

I used to use the STP lead substitute back in a Dart I had, with no issues...Now a days I just have hardened valve seats installed, so I don't have to worry about it.

 

[lewtot184]

there isn't any real substitute for tetraethyl lead. most of the additives are a poor substitute at best, or don't work. some of the additive people tried to use manganese as a substitute for lead and that just causes problems somewhere else. best bet is to just convert to modern fuels and be done with it.

 

[67 coronet]

"real lead"by 104 worked prety good in a 440 charger i had.not sure if it is still available though.i just convert all my engines to hardened vlv seats now.

 

[lewtot184]

"real lead"by 104 worked prety good in a 440 charger i had.not sure if it is still available though.i just convert all my engines to hardened vlv seats now.

real lead actually had tetraethyl lead in it. its been illegal to sell it for many years and i used it also. i use unleaded exhaust seats, stainless valves and quench dome pistons in both my 440's.

 

[alsant]

thanks all , thats what I thought.

 

[alsant]

anyone in my area know a good place to take my heads to?thanks greg

 

[Cranky]

What engine and heads are you running now? The later model heads came from the factory with hardened exhaust seats in them and may be more cost effective to get a set of those. For instance, the 452 big block heads are a good choice....

 

[alsant]

318 poly , stock heads.

 

['69Net]

I read an article someplace a few years ago...that have heads done for unleaded fuel is a waste of time and money???

This article stated that the amount of time involved to degrade valve seats and guides was far greater than the normal life expectancy of the heads...hence a waste of time..

 

[Junky]

Is Marvel Mystery Oil® safe to use in today’s “high-tech” cars?
Yes! Marvel Mystery Oil is completely safe in today’s high-tech cars and provide the same benefits as it has since 1923-cleaner engines, upper cylinder lubrication, reduced acid and sludge build up, improved fuel economy, clean and lubricated fuel systems and many more!

http://www.marvelmysteryoil.com/index.php/site/faq/

I run 2 gallons of avgas with 10 gallons of unleaded for the lead. It also makes the exhaust gas smell better. I use MMO in a pinch.

 

[Propwash]

Is Marvel Mystery Oil® safe to use in today’s “high-tech” cars?
Yes! Marvel Mystery Oil is completely safe in today’s high-tech cars and provide the same benefits as it has since 1923-cleaner engines, upper cylinder lubrication, reduced acid and sludge build up, improved fuel economy, clean and lubricated fuel systems and many more!

http://www.marvelmysteryoil.com/index.php/site/faq/

I run 2 gallons of avgas with 10 gallons of unleaded for the lead. It also makes the exhaust gas smell better. I use MMO in a pinch.

Interesting....Are you referring to 100L/L or the 100/130(green)? Makes sense, being gallon for gallon the AVgas has a bunch more TEL per gallon than automotive grade ever used before they phased it out.

 

[Junky]

Interesting....Are you referring to 100L/L or the 100/130(green)? Makes sense, being gallon for gallon the AVgas has a bunch more TEL per gallon than automotive grade ever used before they phased it out.

The 100 stuff. I get 10 gallons at a time. I have ran 50/50 avgas/unleaded on occasion. The engine starts faster and I notice it runs better. This unleaded crap we are forced to run is exactly that, crap.