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Zddp

Yes its needed either as a suppliment or oil that already has it.If you dont use it or the oil plan on a cam change shortly.
 
Oil manufacturers took Zinc out of oil around 1990 because by that time all your vehicles had roller camshafts, but you do need a zinc additive on non roller applications.
 
Or you can use an oil with an additive package consistent with the SL rating or prior. SM is the new oil and should not be used in the older cars unless you will add ZDDP.
 
There are several companies selling oil additives containing zddp. I switched to Rislone, which comes in 1 qt. cans. It's available at Advance Auto in our town.
 
greenmonsta79 said:
Oil manufacturers took Zinc out of oil around 1990 because by that time all your vehicles had roller camshafts, but you do need a zinc additive on non roller applications.
Click to expand...
ZDDP was reduced starting around that time and only recently was it totally removed from most standard production oils.
 
I used an additive, and had camshaft failure. Switched to Penn oil, and no troubles since!
I was told that the ZDDP wasn't suspended within the oil when just adding it to your engine.... When manufactured, it's part of the "blend" in oils like Brad Penn, and a few others.
Makes sence I guess........
 
67 B-body said:
I used an additive, and had camshaft failure. Switched to Penn oil, and no troubles since!
I was told that the ZDDP wasn't suspended within the oil when just adding it to your engine.... When manufactured, it's part of the "blend" in oils like Brad Penn, and a few others.
Makes sence I guess........
Click to expand...
Funny how H2O will blend excellently when added to oil... :D
 
So I don't sound like I'm being a smart ***, 'blends' are not always done chemically or reacted into the oils. It just depends what compounds are used and added but most additives are just that...added and mixed into the oil stock. Some will mix in more readily and stay mixed while others with separate over time but when it comes to an engine, separation generally isn't a problem.
 
I've got a few old metal cans of Phillips 66 30wt. When I used one of the cans that have been sitting on a shelf for well over 20 years, some very fine metalish filings came out at the end. Meaning, this metalish substance had settled to the bottom of the can. Not surprising. I'm led to believe this is the zinc that was originally meant to protect flat tappet cams. I'll be shaking the cans before I use the remainder!

I was at Monster Mopar and went to the Hughes booth to try and buy some zddp additive that they used to sell. They don't carry it anymore and now sell a moly additive. Moly is supposed to use a molecular barrier between surfaces and it's readily available at any parts store.

As a side note, Mopar Actions Richard Ehrenberg ran a very informative story about Mobil's use of zddp in their oils. Almost all of their blends have had the zinc removed with the EXCEPTION of 15W-50. It still has 1200 ppm, which is the accepted industry standard for protection.

The reasons zddp was removed was a)modern roller cams don't need it, but b) it damages catalytic converters is the main reason! Manufacturers got tired of having to warrant expensive converters and had it done away with.
 
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