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Re: Oils for older vehicles and new engine break in
Posted to Castrol Forum on 7/30/2017 4 Replies

Zinc phosphates are the cheapest extreme pressure additives and as such are still used up to their allowable limits in virtually every available oil product. Those limits are very different for different OEM, ACEA and ILSAC/API service ratings.

Lower SAPS (S... Login to read more.

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