Well ACerf, I now have 313,167 miles on my 05 and I'm STILL on my OEM injectors. I don't know about the additives doing anything for the injectors, I've been using Stanadyne for many years, 8oz every fill up (25 to 28 gals) to keep my pump lubricated and boost the cetane. Many "out there" and, on here also, poo-poo it. Whatever !
As far as I'm concerned, anyone not using an after market fuel filter (2 micron) after OEM, ahead of the CR is asking for problems. I never installed the fuel PSI gauge that mine came with my kit to monitor filtration and time to change, I just change both filters (Bladwin's) every 15K, about the same time I do my oil change.
I've been using Amsoil for everything I own needing lubrication since 1974 and swear by it, same with Baldwin and Stanadyne. I buy Stanadyne in 5gal. cans [$230.00+/-] from my local injector shop to save $$. I buy Baldwin filters for fuel and transmission in bulk also. I do my transmission every 12 to 20K. I bought Dynamite Diesel's 50 HP nozzles six years ago but never installed them. Probably never will.
I've not had the best luck with my Ram compared to my 95 6.5TD Suburban that got me 476,000 (95 to 05) hence needing a new rig stat. So far, I've spent $20K+ from 07 forward on everything except the Cummins engine just to keep it a daily 100 mile+/- freeway driver. e.g., brakes, bearings, hubs, transmission, ball joints and much, much more NOT including, the fore mentioned general lube and filtration maintenance. At 476K, my 6.5TD #2cyl. intake valve took a dump. I hope I can get that out of my 5.9.