With so many gimmicks and claims of fuel mileage gains  its no wonder people are skeptical if a DPF delete kit works. Unlike the gas truck market; increased horsepower & fuel mileage gains are actually obtainable for diesel pickup trucks. Installing a DPF delete kit on your Cummins, Duramax or Powerstroke will substantially increase fuel mileage. Why there may be some confusion about the benefits of a DPF delete kit. When your truck is new with low miles the fuel mileage is the best its ever going to be. Overtime the DPF gets clogged. Regen becomes less and less effective. As the DPF gets plugged fuel mileage slowly decreases. Unless your truck is brand new or the diesel particulate filter has recently been replaced you will absolutely see an instant increase in fuel mileage. The best thing you can do to improve fuel mileage is to install a DPF delete kit. 

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