I posted this yesterday in the towing section with no response, and I am headed out this wednesday for a 5000mi. trip with 2500 of that hauling trailers (averaging 8k lbs.) Anyway I just installed today an H&S mini maxx, cat/dpf delete and an S&B intake on my 08 ext. cab 2wd truck. What are the best setting while hauling and empty for the best MPG? does anyone on here haul and use this setup? What are your results?