I have owned three (3) Dodge Cummins diesel trucks. Until the 2008, I never had a problem with them and worked them all hard. This 2008 with the EPA emissions is a total nightmare. The O2 sensor has been replaced and/or cleaned five (5) times and still corrodes up about every 1,200 miles. My attitude is "If it's not broken, don't fix it!". Why Dodge took a great performing vehicle and screwed it up is a mystery to me. Diesel's have always smoked a little and the environment has never been the worst for it. I'm sure there have been complaints that have driven the EPA to place restrictions on diesel emission, but come on America, don't we have more important things to fix? Leave trucks alone!
4 doors and the room in the cab.
Take the emission controls off. Throw the O2 sensor in the trash!