Update. Gone for a few road trips. I have gained 3 mpg on the highway with the DPF Delete and egr blocked. Still not much improvment around town but I do a lot of short hops so that is part of it I am sure. Towing a trailer. only gets 10.5 average. Actually not bad for such a big truck and running 35 " tire. I thing a torque converter and Co Pilot from ATS are in order as soon as there out. THat should help too.