I have used both oils and reviewed the oil analyses and compared the properties on paper. I have been informed by the chemist that the CK-4 is a superior oil to the CJ-4 in terms of oxidation control, and the quality of the oil is markedly better. When looking at the description of the components, both oils have almost exactly the same amount of additives and antioxidants. The only differences are in the Cold cranking simulator (6535 vs 6290), Gravity, API (33.57 vs 33.71), and viscosity index (177 vs167), and a TBN difference of 1 (11 vs 10).
What am I not understanding here with regards to how much better CK is to CJ?
What am I not understanding here with regards to how much better CK is to CJ?
