Quote: Don't use the CJ rated oils. They are for 07.5 and newer diesels with the particulate filters and have zippo for ZDDP. Use a CI rated if you want to use diesel oil and make sure its not combo'd as CI/CJ.
I think Rotella and Delo 400 CJ-4s have about 1200-1300 ppm of zinc. I've been running it for years as have many others.
