Ford Motor Co. has approved three Shell Rotella heavy-duty engine oils for its diesel-powered Super Duty trucks that meet the API CK-4 specification, Shell has announced.
Ford Offers CK-4 Alternative Oil for Super Duty Diesels
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.