Actually, urea is injected into the exhaust system catalyst (Almost like another catalytic converter) it isn't injected into the motor. I do prefer I6 configurations, however, the Duramax is a great diesel motor. The Ram's 6.7L I6 is technologically advanced compared to the Duramax and Powerjok...er...Powerstroke. The Cummins uses a cooled EGR system and a particulate filter instead of using urea injection. Anywho, I do like Cummins motors. 96xj4x4 - I can understand buying the 550 in your family's case. Good luck with it, I hope it brings you guys more profit than expense.

 

thank man, so far so good, they offer a 200k mile engine warrantee that we are probably going to go for so hopefully either way we'll be alright

 

i would take a cummins over any other diesel. (i own one now) replacement parts are so much cheaper for the cummins diesels then the other. if you don't believe me check out the price of injectors for cummins diesels compared to a d-max or powerwhatever.

i am a huge fan of the L6 engine design anyway. thats actually the reason i bought the truck in the first place.

 

It doesn't matter to me what diesel people prefer. lol. Cummins parts are cheaper. The 200k warranty for the powerstroke is pretty incredible...I'm sure you guys will be fine.