Well, what I think "98dango" is trying to tell you guys is that there has been quite a few problems with the 6.7ltr "bluetec" CTD's and soot build up. I am a lead tech at a Dodge dealer here in the valley. For those of you who have ever bought a new design or "first gen" of anything there's bound to be problems that unfortunatly the public gets to work out the bugs with long term use.
It seem's today's diesle fuel's are just not very clean and create alot of soot. And with all the new fandangled sensors in the exhaust and using a EGR system again, things are getting plugged with soot. I have seen them with less than 10k miles and I have replaced the turbo unit. Nothing mechanical is breaking down, it just gets to the point where the sensors are not reading correctly from the buildup of soot.
I just got handed about a 100 page service bulliten the other day. Quite extensive and it does fix any problems the trucks are having. So any of you guys that have or have thought about getting one, don't fret, it's still the best diesle you could ever buy (imho)
PM me if anyone has any questions for me and I'll do my best to get them answered