OP, this is confusing subject that FCA made it even more confusing.
First gen. of that engine in FCA vehicles in the US had issue with bearings. Band aid was Rotella T6 of ACE AA3 oils. Problem in the longs run is of course, higher SAPS levels in T6 and especially ACEA A3 compared to C3 oils that initially were required.
Your engine should have bearing issue addressed and you should use C3 oils if you plan to keep vehicle pass warranty. Now, I said FCA should have addressed bearing issue. For that reason, I would personally go with thick ACEA C3 5W40 oil. I think best suitable oil for that application, taking DPF into consideration, would be Motul X-Clean Gen2 5W40 as HTHS is at 3.9.
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