Ford Approved Oils For Diesels:
All oils should be WSS-M2C171-F1 compliant. I personally use the Motorcraft brand following the logic that it was good enough to be selected by Ford for use in their diesels.
2011 F350 4x4 XL Crew Cab Dually
2010 Keystone Fuzion 405 Toyhauler
Last edited by badbart; 07-26-2018 at 05:32 PM.