High-zinc oil additive for diesel engine break-in and routine oil changes. A must for flat-tappet camshaft installations.
This high-zinc (ZDDP) oil additive boosts the anti-wear and extreme-pressure performance of modern API CK-4 diesel oils, which have had their zinc levels reduced to protect emissions equipment. Recommended for every oil change in performance diesel engines, and required during break-in of any flat-tappet camshaft, lifter, or valve spring upgrade.
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