Fleetgaurd or mopar filters for fuel and oil.
The fuel filters are amazing in the new dodges.
I do my oil every 6 months as I do not get the miles or the hours sooner. Doing oil analysis and it could go much longer but it is under warranty.
Idling the new diesels does not hurt them.
Fuel dilution of oil is also very minimal with new emissions. Very little egr is used and dpf burn off is only at highway speeds. Leave the emissions intact until warranty is gone.
Keep def fresh. I never fill mine. Just add 2.5 gallons and when the gauge gets in the red. That is about half full but gauge will show full.
Oil pressure and engine oil temp are calculated and not real so ignore them unless the low oil pressure light comes on. I add an edge insight with a egt probe and an oil pressure gauge to mine just so I had the info. Not needed but I like it.
Got 15k on my 2018 and it is a beast. Yell if you have any questions.
Oil changes are a mess unless you use a plastic bag or a plug on the filter as it has to come out sideways through the tire well. Or pull the intake line from the filter box and do it from the top. I do mine that way and it is fast and zero mess.