Zinc In Oil for ZZ3
08-01-2009, 09:35 AM
#42
Le Mans Master
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I have a 73 with a 93 ZZ3 crate engine. I am sure there are other threads about zinc in the oil, but was not sure how to find them. So, do I need to start looking for oil with zinc for the ZZ3? If yes, can somebody recommend an oil? I have been running Mobil 1 in it for many years now, and Valvoline 20W-50 Racing oil for an occasional track day.
Based on this the author is stating that the current post-2007 CJ4/CI4 rotella has a minimum 1200ppm and is more than sufficient for a broken in flat tappet engine. Anybody NOT agree with that conclusion?...(not based on YOUR opinion..based on the article in which the author is presenting himself as an actual SME on the subject).
To me this suggest that all the hysteria over the new Rotella is just that...hysteria!
To me this suggest that all the hysteria over the new Rotella is just that...hysteria!
I agree 1200% ... I run "new diesel truck oil" in everything I have: gas mower-diesel tractor-flat tappet vette-roller tappet lincoln-roller tappet Sonoma. For the disinformed, it matters not so much what GF-4 etc may dictate are upper limits of what might be there ... instead suggest seek out data from recent Virgin Oil Analyses of "new CJ" & see what spectroscopy determines is actually present ... what & how much is really in there matters most.
08-01-2009, 10:16 AM
#43
Le Mans Master
Hmm. I don't think of myself as "disinformed". 
The MSDS is a good place to start, and no pushback on getting an oil analysis. But it certainly does matter what GF-4/CJ-4 specs as requirement IMHO. 
Although it was noted that no opinions, only facts, be put forth regarding 1200 PPM as a reasonable floor for ZDDP - I haven't seen anything yet We seem to be taking one article and basing everything on it, and are still offering personal experience as validation and making recommendations based on that.
So, we'll agree to disagree - as we all knew how this thread would turn out Rather than trying to reach consensus, which I don't think is happening, maybe we we can note that 800 is too little based on failures post GF-4 implementation, 1200 is suggested by the engine SME and 1600 is too much. Get validation from reputable sources on the actual amount of ZDDP, and determine what makes sense from your risk management perspective.
Since we're basing so much on one article, does anyone have Duke Williams full bio? Everything I found indicates "Retired automotive/aerospace engineer" - clearly a smart guy and an NCRS member with a sweet ride, but it would be nice to know who we're basing all these recommendations on, don't you think?
The MSDS is a good place to start, and no pushback on getting an oil analysis. But it certainly does matter what GF-4/CJ-4 specs as requirement IMHO. Although it was noted that no opinions, only facts, be put forth regarding 1200 PPM as a reasonable floor for ZDDP - I haven't seen anything yet
We seem to be taking one article and basing everything on it, and are still offering personal experience as validation and making recommendations based on that.So, we'll agree to disagree - as we all knew how this thread would turn out
Rather than trying to reach consensus, which I don't think is happening, maybe we we can note that 800 is too little based on failures post GF-4 implementation, 1200 is suggested by the engine SME and 1600 is too much. Get validation from reputable sources on the actual amount of ZDDP, and determine what makes sense from your risk management perspective.Since we're basing so much on one article, does anyone have Duke Williams full bio? Everything I found indicates "Retired automotive/aerospace engineer" - clearly a smart guy and an NCRS member with a sweet ride, but it would be nice to know who we're basing all these recommendations on, don't you think?
Last edited by billla; 08-01-2009 at 10:27 AM.
