I wouldn't use any oil, other than what FCA stipulates. I took a look, at my last oil change, they used part number, so I have to verify with them, they did say Pennzoil, but no info on viscosity, etc. I have to see to it next time, those details are put in. This way, I can verify through testing on viscosity, etc.
If dealer are not using the right oil, just using what in stock, or deliberate or ignorance, then expect major engine problems.
My report is so good, I'm going to do another test with another lab. Just to be sure and also, I want to test one lab against another.