I'm lookin at 2 trucks. One is a 5.9 and one is a 6.7 both autos. I've read that the 5.9 is a better due to emmisions crap on the 6.7. My wife has a 2 mile commute to work and at least for the next 11 months, she will be driving it to work 5 days a week. Question is one truck better for the short commute than the other? I think I read somewhere that the emmisions crap on the 6.7 is bad for short trips. Is there anything I should know for decision basis about short commutes on diesels? Thanks for any input. This will be my first diesel and I want it to last a long time.