I have a 2007.5 Dodge with the 6.7L. You'll hear lots of stories of problems with this engine but its quite distorted. The 6.7L itself is rock solid, one of the best ever made. The problems were with the new EPA required emission garbage. Lots of issues early on with emissions. Mine was in the shop quite a bit the first year. But those issues have all been resolved. Now have 72,000 miles on it and last time it was in the shop was 60,000 miles ago. The new 6spd auto tranny is awesome and the factory standard exhaust brake works fantastic! This is by far the best truck I've ever owned despite the early problems.