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Ford Offers CK-4 Alternative Oil for Super Duty Diesels

March 20, 2017, by Paul Clinton - Also by this author

Screenshot via Ford.
Screenshot via Ford.

Ford is recommending the use of a new Motorcraft diesel engine oil for its Super Duty trucks and warning fleet and commercial customers to avoid using most new CK-4 or FA-4 oils because they may cause damage to the engine, the company told AutomotiveFleet.com.

Motocraft's WSS-M2C171-F1 formulation should be used in all Power Stroke diesels, especially the 6.7L that powers the F-250, F-350, and F-450, because it better protects the engine against high-mileage wear, according to the company. Ford had previously recommended CJ-4 formulations for its Super Duty trucks. On Dec. 1, the American Petroleum Institute began licensing the new CK-4 and FA-4 oils. CJ-4 oils will eventually be phased out.

Commercial users should avoid the FA-4 formulation due to its low viscosity. CK-4 motor oils should be avoided because they provide "inadequate wear protection," according to a statement. The oil drain intervals remain unaffected, said Sherrice Gilsbach, a Ford spokesperson.

The oil certification information is located on the back of the oil pouch in a circle known as the API donut.

Customers shouldn't use oils labeled CK-4/SN unless they have been approved by Ford to meet WSS-M2C171-F1. This is possible with SAE 10W-40, 15W-40, 5W-40 and 0W-40 oils. SAE 10W-30 oils showing CK-4/SN cannot meet WSS-M2C171-F1.

Motorcraft Super Duty diesel motor oil is formulated with premium hydroprocessed base oils and additive technology necessary to meet WSS-M2C171-F1. This new oil also meets the requirements of Cummins CES20086, Detroit Diesel 93K222, Volvo VDS-4.5 and Mack EOS-4.5, according to Ford.

View a video from Ford here:

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  1. 1. Cliff [ March 21, 2017 @ 09:53AM ]

    Causes me to wonder if Ford PStroke engine design is inferior. All major Diesel engine OEM's are firmly in the CK-4 camp and all factory filling and recommending 10w30.

  2. 2. Stacy [ May 19, 2017 @ 11:58PM ]

    NO! A separate independent company also tested it with other engines and got the SAME results with different makes and models. Ford probably does more rigorous testing than it's competitors. Watch this and see for yourself: https://youtu.be/bAdGTsOeQVQ

 

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