Zinc additives

From what I understand the Rotella with the high Zinc content is a thing of the past as well.
Nope. Where did you understand that from? Even the lastest CJ-4 rated stuff for the EGR/Particulate filterered diesels still has plenty of zddp/phos add.
ya, i work at jiffy lube and my boss told me...
:notworth: =D> You should rely more on :book: instead of the boss of a joint designed to seperate customers from their cash in exchange for bulk conventional oil, cheap filters and unnecessary services.