Hello,
I recently bought a 1969 JD 400 with a Diesel engine.
The engine oil is black as night. What oil should I use for an oil change?
The book says JD torq-gard. Above 32 F to use SAE 30. -10 to 32 F to use 10W20.
This isn't my first rodeo and I know oils have changed a bit in the last...