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Veteran
Posts: 174
 
| does anyone use a gas lead supplement in there forward look cars |
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Expert
Posts: 3575
  
Location: Netherlands | No.
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Expert 5K+
Posts: 7393
Location: northern germany | johnnybiz - 2018-05-20 3:15 PM
does anyone use a gas lead supplement in there forward look cars
Yes, as it does not only lubes the valve seats, it also lubes the cylinder walls/rings and valve stems. I do that for almost 30 years, engine still runs like new, drive almost daily, so it is safe: mix gasoline with teflon grease (slick50 etc), looks like milk and give a couple of shots into the tank each time when I fill up. Clogs paper filters but not the plastic one in the tank. So the oe tank filter and the Holley filter mesh in the carb is all i use. Works without any problems. |
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Expert
Posts: 3033
Location: N.W. Fla. | For the most part it seems to be unnecessary, the epidemic of older cars having burned ex valves doesn't seem to have happened. Some FL engines came with hardend valves & seats, some didn't. What do you have?
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Expert
Posts: 2289
Location: Eastern Iowa | Happened to me!
50,000+ miles on the F since 1985.
2012, burnt 2 valves on the way home from the 300 Club spring meet in St. Louis.
Went w/hardened seats that time around. |
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Expert
Posts: 3774
Location: NorCal | I think the performance level of the engine dictates lead supplement use. |
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Expert
Posts: 3575
Location: Netherlands | Burned valves could very well be caused by a (small) vacuumleak in the intake or carb-gasket, making a cylinder run lean, or a lean running carb all together.
Or someone hooked a PCV system (if fitted) onto a fitting located on an intake runner, again making 1 cylinder run lean.
My opinion is: By the time the valveseats are possibly worn by lack of lead(substitute), the heads themselves need to be rebuild anyway. So why not save it all in one repair?
And then again, besides a few enthusiasts, who is actually daily driving their FWLKer these days and rack up considerable miles every year?
Edited by BigBlockMopar 2018-05-21 3:52 PM
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Expert 5K+
Posts: 7393
Location: northern germany | Burned valves? What in the lead supplement could prevent that? I'm with BigBlock here. At least I never heard about that.
Edited by 1960fury 2018-05-21 4:32 PM
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Expert
Posts: 2002
Location: Branson, MO | I use it all the time. Not expensive and what harm is there? If even it helps a little, it's better than nothing. |
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Expert 5K+
Posts: 5006
| our cars run a low rpm... unless your drag racing/high rpm or running 300k a year i wouldnt worry about it or use a lead substitute.
It imparts similar lubrication on high heat to the valves like lead oxide without ruining a catalytic converter and dumping lead.
https://www.redlineoil.com/lead-substitute
https://www.amazon.com/Motor-Medic-M5012-12PK-Lead-Substitute/dp/B00...
Lead was initially added for anti knock.. Lead increases the octane rating of gas... but it also dumps lead oxide on the valves which helps wear.
https://www.jalopyjournal.com/forum/threads/do-i-need-a-lead-substit...
https://www.wired.com/2013/01/looney-gas-and-lead-poisoning-a-short-...
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Expert 5K+
Posts: 5006
| https://shop.advanceautoparts.com/r/advice/car-maintenance/what-lead...
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Expert 5K+
Posts: 7806
Location: Williams California | I've never personally used it, and I drive my old cars on very long trips.
I was told years ago, that most problems from unleaded fuel use in older cars, were those cars used for long high speed drives, and drag racing where engine temps raise very quickly.
This info was from an engine builder that raced in the Reno/Sacramento area in the seventies to the early nineties.
---John |
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lead supplement
