Took my truck in Tuesday for recall only to have the MIL come on after leaving dealership. The reason for not wanting recall fixed. (If it ain't broke don't fix it!!) They didn't have the latest update version from Chrysler for the ECM re-program. The problem solved after new ECM up-date and EGR de-soot was completed. Mechanic said there was a pretty good amount of accumulation on the EGR and asked if I used my e-brake. Truck has 14000 miles and about 10000 of that is with pulling 11,000 lb trailer and using e-brake. He informed me that Chrysler is recommending using the brake as often as possible to prevent the build-up of soot. Many nightmares out there about this soot problem. I have seen no difference in mileage or power. I had the oil analyzed after 7000 mile from dealer change. Blackstone advised only about fuel in oil. It was 4% which is over the 2% recommended. I switched to synthetic and will analyze again in 5000 to see if my money is being wasted on expensive oil changes. After having a 2000 model (2500) with 165,000 and another 2003 model (3500) with 203,000 and no problems from the engine, I think I will still stick with my Cummins. The bugs always have to be worked out as with anything new on the market (diesel emissions). I'm sure when the other manufactures follow suit, there is going to be considerable learning from experiences with the Cummins closed system. I wouldn't trade my truck for anything.