What Oil should you use in your 1993 F250 Diesel?

A 1993 Ford F250 diesel likely uses a different oil depending on the specific engine. The most common diesel engine in that year was the 7.3L IDI (Indirect Injection) engine, but there might have been other options available.

For a 1993 F250 with the 7.3L IDI diesel engine: You should use 15W-40 diesel engine oil that meets the specifications CF-4 or better. Some modern oils meeting CJ-4 are also backward compatible, but always check the oil's label to confirm.

Crucially, you must check your owner's manual. This is the definitive source for the correct oil type and viscosity for your specific truck and engine. The owner's manual will also specify the correct oil capacity.

Using the incorrect oil can severely damage your engine. Don't rely solely on online information; consult your owner's manual before changing your oil.