Zinc in oil

crazydaveEFI Expert

As we all know and have heard, zinc is dissapearing in motor oil. It has been estimated that low zinc levels in newer motor oils has been causing cam failures in older engines. Older levels of zinc were at around 0.2% but new oils can be as low as 0.05%. Few oils still have higher levels of zinc such as Valvoline VR-1 oil. Stp now has a new oil additive that is not that old thick goo. Their new oil stabilizer contains 6 times the amount if zinc (ZDDP) that was in a single quart of older spec motor oil. This means you should be able to add this to a flat tappet cam engine and have plenty of zinc.

3/2/075:16 PM

Original Post

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