Darwin
Explorer
A couple of clarifications, the EGR is not attached to the DPF, it is attached to the motor. It is also the EGR that causes fuel contamination, not the DPF. The newer trucks with SCR that use DEF use significantly less EGR to meet emission standards. The Cummins has a 6 month 15000 oil change interval for reference. With a new truck you get the warranty, so if anything happens you are covered. I don't see it being a big deal if you are sticking with travel in the USA and Canada. Not many places you can actually get that far out there since your are not rock crawling. Better suspension and frame also is found on the newer ones so less money that needs to be invested in those mandatory upgrades that are required on an older truck. The newer ones Ram, fit 37's with no lift. Considering the outrageous prices for low milage 5.9's its a no brainer to me. I carry a slide in camper so I am bias for anything like the newer ones that offer a lot more payload.