Ram recommends 10K oil changes, and yes, to be within warranty and compatible with your emissions equipment you need to use the specified oil type.
This thread has all kinds of info about oil changes:
http://www.ecodieselram.com/forum/threads/ram-ecodiesel-oil-change-information.318/
Here is a recent leveling kit thread:
http://www.ecodieselram.com/forum/threads/leveling-2015-ram-1500.675/
Some good info also just by searching "leveling kit". A lot of folks have different ones with no problems reported.
If you're wanting to stay stock and "in warranty", a cold air intake...
Welcome Steven!
The problems with sites (such as this one) are most people join to post a problem.. not to say how good their truck is.
The EcoDiesel's have had their problems that's for sure, but nothing to go out and think about trading it off (especially while you're in warranty). Time...
Welcome to the lost motor club. Hopefully the dealer will share what happen and get you on the road. If you haven't, perhaps open a case with Customer Care and maybe they can move along the process a little faster.
All,
If you've requested stickers from me and haven't got them yet. Send me another PM with your address and I'll try again. It's possible I missed some. Sorry for the delay!