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Truck Blog

Oil

Truck Engine Oil Q & A

Truck Engine Oil Q. Why can’t I use a CI-4 Plus truck engine oil in an engine that calls for CJ-4?

A. CJ-4 oils are formulated to provide optimum durability and compatibility for diesel particulate filters. Using CI-4 shortens the service life of the diesel particulate filter. Expect to replace the DPF or a budget for higher maintenance costs and engines manufactured after 2007 require using of CJ-4 oils because they come with DPFs.

Q. If a truck engine oil meets the API category and any other standards set by my engine maker, what’s the difference between that and a premium… Continue reading