If the truck doesn't regenerate it'll do 20 MPG easy. I know because I drove over 500 miles with no regeneration and man was it nice......................if I didn't plug up the DPF, HAHAHA..................

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2007.5 Dodge Ram 3500 HD,QC, 6.7L Cummins, 6speed Auto, 4X4, Bighorn Edition.
Click for installs: Carr Steps PML Diff Cover Edge Juice with Attitude Volant Intake Hankook ATM RF10