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SVTPerformance's Chain of Restaurants
The Greasy Spoon
Zinc Additives
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<blockquote data-quote="oldmodman" data-source="post: 13899720" data-attributes="member: 10303"><p>I thought that the whole "zinc" problem came about when Cam manufacturers started sourcing their lifters for the flat tappet cams from China. </p><p></p><p>And since they were poorly made, improperly heat treated and would gall if you looked at them wrong people jumped to the assumption that the fault was in the newly mandated low zinc oils.</p><p></p><p>The solution of adding zinc to a good oil is a band-aid fix for lousy followers.</p><p>It will let the followers to burnish into proper contact with the cam (break in), and can then be discontinued. </p><p></p><p>HotRod magazine did a test a few years ago by running a newly built engine in on a dyno and tested not only the zinc additive, high zinc content old stock oils, bad Chinese followers, and the WAY more expensive new followers from the last American manufacturer.</p><p>They would run one combo then pull out the cam and followers for examination and after a dozen tests came to the conclusion that a properly made and heat treated follower did not require any special break-in or additive to the oil to function properly.</p><p>But, and this is a very important but, you have no real way of knowing where your new followers were sourced so it is just an insurance policy to use high zinc break in oil or use the additive to your normal oil for the first 500 miles.</p></blockquote><p></p>
[QUOTE="oldmodman, post: 13899720, member: 10303"] I thought that the whole "zinc" problem came about when Cam manufacturers started sourcing their lifters for the flat tappet cams from China. And since they were poorly made, improperly heat treated and would gall if you looked at them wrong people jumped to the assumption that the fault was in the newly mandated low zinc oils. The solution of adding zinc to a good oil is a band-aid fix for lousy followers. It will let the followers to burnish into proper contact with the cam (break in), and can then be discontinued. HotRod magazine did a test a few years ago by running a newly built engine in on a dyno and tested not only the zinc additive, high zinc content old stock oils, bad Chinese followers, and the WAY more expensive new followers from the last American manufacturer. They would run one combo then pull out the cam and followers for examination and after a dozen tests came to the conclusion that a properly made and heat treated follower did not require any special break-in or additive to the oil to function properly. But, and this is a very important but, you have no real way of knowing where your new followers were sourced so it is just an insurance policy to use high zinc break in oil or use the additive to your normal oil for the first 500 miles. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Greasy Spoon
Zinc Additives
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