Ford is recommending the use of Motorcraft -branded diesel engine oil for its Super Duty trucks and warning fleet and commercial customers to avoid using 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.
