Frequently Asked Questions - Products - CJ-4 Specification
Lubrizol is one of the leaders in oil additive technology, and this FAQ on the CJ-4 specification is excellent and addresses some of the common questions. It is great that some of the texts in the matrix evaluated both the use of ultra-low sulfur diesel AND non-ultra-low sulfur fuels, but it's worth noting that the new tests added for valvetrain wear and ring/liner and bearing wear are not done with the higher sulfur fuels.
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