The results are in on four more heavy duty diesel engine oils, and the tests conducted on the samples meet the SAE J300 specifications for the SAE Viscosity Grade listed on the product label, and are consistent with the listed API Service Categories, or in the case of the Ford Motorcraft motor oil, the listed OEM specifications.
It’s important to note that Ford Motorcraft did not make the move to API CK-4 due to concerns about wear issues related to the lower phosphorus levels specified in CK-4. In a position statement, Ford said, “Ford will not be recommending the use of CK-4 motor oils in any Ford diesel engines, new or old. Ford testing has shown some CK-4 type formulations have shown inadequate wear protection compared to CJ-4 formulations developed and licensed before 2016. Ford now recommends using oils that meet our OEM specification, Ford Material Engineering Specification WSS-M2C171-F1.”
It should also be noted that although John Deere PLUS-50 II™ API CK-4 is in the market, the product was not available at the John Deere dealers visited by PQIA in June 2018. Instead, PQIA only found CJ-4/SM available.
CLICK BOTTLES BELOW FOR ASSESSMENT DETAILS
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CJ-4
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WSS-M2C171-F1
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| CAT DEO-ULS | Kubota | John Deere Plus-50 II | Ford Motorcraft Super Duty Formula | ||
Other API CK-4s recently examined and reported on by PQIA
The following are other HDEO API CK-4 brands on retail shelves recently examined by PQIA. The test results for each of these brands all meet the SAE J300 specifications for the SAE Viscosity Grade listed on the product labels, and are consistent with the listed API Service Categories.
The data and assessments for these brands can be seen by clicking on the images of the products below:
