Had my 2008 6.7 for 1 year and 10k miles. Mileage not real good still. What can I co to increase mileage, like Banks stuff?, that will increase mileage and continue with warranty? Dont really care about more power, just more mileage. thanks

 

im not real sure about the 6.7 mileage yet, but do your self a favor, if you decide to do some mods, dont use banks, unless you like wasting money. im sure someone here has gotten some improvments and will let you know soon