Scott mentioned that his preference was for Delo 10-40.  I recently
had the opportunity to work with a very competent fellow in Oregon on
some transaxle upgrades.  He also intimated that the elimination of
Zinc compounds from
dino oil over the past years has caused these lubricants to be
significantly less effective. His recommendation is to upgrade to a
CJ-4 rated oil. Delo 10-40 is one, other suppliers including
Pennzoil also have SAE CJ-4 rated lubricants. This is the rating
for diesel motors.

Costco locally has Delo 10-40 at a very good price.

pensioner