02-24-2014, 04:09 PM
I did a little more research on oils today. My Detroit Manual specifies CH-4, 15W40, and this oil was introduced in 1998. I use Delo synthetic 5W40 which is rated by API as CJ-4/SM. This oil was introduced in 2004, replacing CI-4, CH-4, and CG-4 (and the various +s) and is designed to significantly reduce wear due to the additive ZDDP which adds needed phosphorus and zinc with less oxidation. From what I read, it is recommended for both new and older 4 stroke diesel engines. Some like apples, and some like oranges. I used very little oil for the last year, and at only $20 per gallon, I am inclined to continue using it in both engines.
2001 Newell #579
tow a Honda Odyssey
fun car: 1935 Mercedes 500K replica