Welcome. Glad you're under warranty, and even better since the dealer maintained the truck. They really can't point any fingers now..
Keep us updated on the engine progress.
FCA recommends it to be used under 30, as noted here:
https://www.ecodieselram.com/forum/threads/r51-fca-recommends-a-winter-front-cover-for-colder-climates-with-ecodiesels.521/
Here's a great thread for you! Welcome to the forum (y)
https://www.ecodieselram.com/forum/threads/ram-ecodiesel-oil-change-information.318/
also this: http://www.ecodieselram.com/forum/threads/psa-fca-changes-oil-specification-requirement-for-ram-1500-ecodiesels.820/
Good info.. looks like it's for Windows and/or Android software. Looks like $49 for the cost, and the adapter is here: http://www.alfaobd.com/index.html
Could always get a smaller one: https://www.amazon.com/dp/B008SEBQ2G/?tag=jhdiesel-20
But, you're not going to get the stations like before. I don't use FM radio anymore so it wouldn't be a worry for me..
Anything can be detected by the dealer if they want to find it. As far as tuning, it's really hard to beat custom tuning with a reprogrammed ECM. I think you'd all around enjoy it more.
We've got plenty of reading on that here!