Hi I have a 06 dodge 4x4 2500 quad cab sports package 9000 miles on it. I have intsalled the pillar guages , trans temp, pyro, and boost. I also have the diablosport predater power puck combo set to performance and fuel effiecency. Plus a boost fooler. My computer in the truck says Im getting 23 miles to the gallon when I hand calculate I get 15 miles to te gallon. Wonder what you think I thougth the cummins was suppsos to get better fuel mileage. Wonder what you guys think?