Originally Posted by dlundblad View Post
I switched FROM Valv. ML to Rotella years ago, due to the lack of ZDDP but IIRC they changed there formula years ago and got rid of the zinc and phosphorus and upped the moly and boron. There was talk back than about the ML having X amount of recycled content so I jumped ship. I never thoroughly researched the above claims because at that time I was learning about HDEO and I now HDEO's in EVERYTHING. If I was going to use a PCMO it would be a SOPUS product, definitely PNZL HM over Valv. ML.
My 4.0's have had a steady diet of T5 (summer) and PNZL HM (winter)for a long time.
here is what I can find for a VOA of ML......
based on the above there are MANY better oils for a 4.0 than ML. maybe try veggie oil !!
QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.
-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift