Originally Posted By: Marco620
Dont add HM M1, its got seal swelling ability and will ween from not having it. Try Castrol Magnatec or QSUD with short intervals.
High mileage oil will not hurt one thing. Wives tale. I run Valvoline HM 5w30 full synthetic in my 2.7 and I am very happy with it, the motor is way quieter than with pup and no more black tailpipe residue, I just picked up 2 5 gallon jugs a Walmart with the dexos1 Gen 2 logo on the label, (it was on the back of the shelf behind the old formula stuff).