I have always used Shell Rotella in all my diesels, including my old GM 6.2L, which it did wonders for with smoke. My next go around I will try Royal Purple, its gonna be costly but what the heck. Also check out
Blackstone Laboratories before you change. Some guys here including me, have their used oil tested when changed. Its a pretty cool deal, they'll send you a whole work up sheet on you oil and whatever other fluids you send them. Filters, I just go with Motorcraft. Hope this helps.