Join Date: May 2011
Location: El Dorado Hills
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Do an intake (DIY 6637 is the best bang for the buck) do a search for it and you should find all of the info you need on that.
Do a 3" downpipe, and 4" straight pipe from there.
Get a set of gauges (I highly recommend ISSPRO EV2's) Pyro/boost/trans temp if its an automatic.
Then you can get a custom tuned chip. I suggest Tony Wildman, or PHP. I have run both on three of my trucks and love them both. Tony offers free re-burns for life which is awesome.
Make sure tires are properly inflated, any excess weight is ditched. Switch all fluids from front to rear to synthetics. Inspect all brakes to make sure nothing is dragging. Keep the RPM's UNDER 2,000. Do not use the cruise control. Clean the EBP tube (Exhaust Back Pressure. Again do a search, tons of write-ups, and there is even a youtube video.) Check the turbo, and up-pipes for boost leaks, this can cause a loss of power, and lower fuel mileage.
Also, winter blend fuel is known to reduce mileage by about 2 MPG's. Make sure to take that into account.
That is about all that you can do to get optimum mileage. Remember, you are driving a 6,000+ pound commercial grade diesel truck, you''re not in a Prius.
Lariat CCSB, 4x4, ZF6 249k, 6.5" Procomp lift, 37" Toyo M/T's, 20" Fuel Hostages. PIS 160/30's, PHP Hydra, 6637, 4" exhaust, Tank mods, ISSPRO's, 08+ mirrors/tailgate/tail lights, M12000 winch.