Originally Posted By: userfriendly
Thanks Zeng, that is the second time that engine went 6 months @ 3,000 km per month.
I forgot to post 2013 1500 5.3L SLT 10% over OLM, 14,000 km also with Duron 15W40 CJ-4.
I have a hankerin' to try 10W30 FA-4 in a new 6.2L max-trailer SLT.
When CJ-4 replaced the high SAPS CI-4+, I was hesitant to switch, but after a few UOAs... stuck with the new and never looked back.
Duron 15W40 CJ4/SM(?) seems very robust ... I would've tried a CJ4 if not for its price.
Btw, what's your intended OCI for this 'lower spec' Mobil 1330 SAE 30 ?