UREA = UREA.. Platinum DEF has some great marketing. Change your oil and fuel filters on time and try your best not to run the truck on the red for fuel level, top up around quarter tank is best practice. Learn to do some maintenance yourself and you will get to know your truck a lot better and you will realize these things are not as difficult to work on as one may expect.
Oh and don't forget, as a Ram HD driver, tailgate people in the slow lane that are going well above the speed limit.