Originally Posted by Black Rover
Just spoke with my Chrysler Service Department and they told me that all Cherokee's come with regular motor oil and regular is what they use when they do oil changes. Everyone of my new cars for the last 5 years came with synthetic oil so I may change to synthetic after my 5 free oil changes from my dealer.
It is right in the Owner's Manual that the 2.4L uses 0W20. 0W20 isn't offered in conventional oil in any brand I know of. As said the SOPUS stuff which is FF is all synthetic. I believe there may be a couple synthetic blend 0W20's now( ConocoPhillips has one I seem to recall )but most of it is full synthetic and as said I have never seen a conventional.
2.4L Oil Weight:
3.2L Oil Weight:
Note - I know under the 3.2L info it talks about using synthetic if it meets the spec's etc... However, as said I know of no conventional 0W20 and I have looked. Pennzoil and Shell, which provide the FF for Chrysler now, don't offer anything but synthetic 0W20( unless it is new and not shown ). MOPAR 0W20 is Pennzoil Platinum relabeled last I knew.
The only Pennsoil 0W20 they have( shown )is the Platinum synthetic. Shell Helix only shows 0W20 in their AJ20 synthetic for regular use. They do have a Helix racing oil in 0W20 that is a blend but that wouldn't be used for regular cars. Doesn't appear Helix is even offered in the US though? So again, I believe the 0W20 FF/MOPAR oil is Pennzoil Platinum.
The dealer you spoke with may be using their bulk 5W20 for the 2.4L Cherokee "assuming" that is what it takes as Chrysler has used that now for a while in most vehicles( including the previous 2.4L World engine ). They may not realize that the 2.4L Tigershark in the Cherokee actually calls for 0W20.
Note 2 - FWIW the Dart 2.0L and 2.4L call for 0W20 as well.