Ok so I think the time has come for a tuner to optimize my fuel mileage. I've always had good success with the banks products. The tuner needs to support DPF on. The truck needs to remain reliable for work! I do about 2-2,500 per week. I'm getting about 18.2-18.8 religiously from a CCLB 3:55's stock everything. Truck weighs 9400lbs on a certified scale. With the amount of miles I do 2-3 mpg gain would be great. I'm looking for real numbers and don't care kow fast it is the truck has plenty of power.

 

I run a Bully Dog on mine, fuel mileage help? Not that I could see. Your better off with a cold air intake. Banks make a good tuner, and I've been looking at a "engine brake" for my 6.7 I run heavy too and it would sure help on steep downgrades and off ramps