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-   -   Is Shell Rotella 15-40 a good oil? (http://www.peachparts.com/shopforum/tech-help/143379-shell-rotella-15-40-good-oil.html)

Duke2.6 04-01-2011 10:19 PM

You obviously didn't read the article linked in post #26, or the API 1509 specification.

Zinc is not limited by the API specs. Another element that is a component of ZDDP is.

What is it?

You need to get with the program if you want to understand engine oil and stop spreading misinformation.

Duke


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