Congrats on the new truck Syn. Beautiful color. My 2017 Limited is also Delmonico Red with chrome bumpers. Never thought I'd like a red truck, but it's awesome.
I was a long time Ram diesel owner before moving to my current 1500. My last diesel, was a 2011 3500 SRW. No longer needed the towing power of the diesel, hence the 1500.
In both of my diesels (1995 2500 and the 2011), I ran Schaeffers 15w-40. In the 95, that viscosity was highly recommended and is what I ran. In the winter, I ran Schaeffers 5W-40 in the 2011. Starting was easier in very cold weather with the 5W-40.
Schaeffers can be hard to get, but I've found that contacting and working with a local rep, you can get very good pricing.
There are a lot of other very good diesel oils out there as well. I just settled on Schaeffers. I did run Redline 15w-40 diesel oil for a year or two in my 95. At the time I was getting it from a local race shop who discounted it for me making it slightly less expensive than Amsoil. Unfortunately, tho they are still in business, their discounts on Redline are history.
I used Fleetguard Stratopore filters exclusively. Can get them from Geno's, as well as the small micron fuel filters, also Fleetguard. I replaced the fuel filter on my 2011 every 15K miles which was earlier than the recommended interval simply because diesel quality varies so much. On a side note, if the on-engine fuel filter cannister on yours is the same as on my 2011, although Geno's sells a 29mm 6-pt socket that "fits" the hex on the fuel filter cover, it fits quite loosely, and is for a 3/8 ratchet/extension. An 1 1/8" 6-pt socket, 1/2" drive fits it more snugly and the 1/2" drive gives you more torque.
One note I recall from reading the Turbo Diesel Register on the newer (2013+) diesel Rams, is oil filter access. Ram added a chassis cross member brace on those newer trucks which is right under the oil filter area. On my 2011 removing the oil filter was easy from underneath with a fluted filter cup and a ratchet and long extension. Not possible on the newer trucks. Either will have to try thru the passenger side wheel well (tricky), or by removing all the intake ducting from the airbox to the turbo, thereby freeing access to it from the top.
As you accumulate the miles on your truck, pay attention to your front ball joints. The Cummins engine weighs over 1100 pounds and those ball joints will wear more quickly than those on a lighter 1500, or even a gas 2500. I replaced them on both of my diesels (I've got the press and appropriate cups) and it's a bit of a PITA.
Sorry for the long post. Hope some of the information is helpful. Best of luck with your new Ram!
