Generally, Ford F-350s with diesel engines require a high-quality diesel engine oil that meets the specifications outlined in the owner's manual. This often includes specifications like:
* API CK-4 or CJ-4: These are industry standards for diesel engine oil. CK-4 is the newer standard and generally preferred.
* Specific viscosity: This will be a number like 5W-40 or 15W-40, and is critical for proper lubrication at various temperatures. Again, check your manual.
Using the wrong oil can severely damage your engine. Do not rely on general advice; always check your owner's manual for the correct oil type and viscosity.
