Hello, i'm still kind of new here but i need some help and fast! I am about to buy a 2002 Dodge Ram 2500 Cummins diesel and i'm still in high school, so i'm not really concerned with power and all that, I have to increase the Fuel Mileage by as much as possible. Chips, air filters, and whatever will help. Please help me by listing stuff that has helped all of you save on fuel mileage. I am about to get a job so i can pay for the insurance and diesel fuel, but i am wanting to increase the mileage by as much as possible!! please help!