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What Kind Of Mpg With The 6.6l Duramax Diesel?

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I am thinking of trading my F150 in for a 2500 Diesel Silverado. But before I do I want to see what kind of MPG people are getting. My brother-in-law has a Sierra with a programmer on his Diesel and is getting way better MPG than my truck and he is lifted 6" with 35" tires! Please post some MPG results and if your stock or tuned.




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Have an 05 at work that I just got 16.9 average on a 2000 mile round trip. It has 134000 miles on it and has a weight of just over 8600 with the gear in it. From everything I've read the older models get a little better mileage than the old ones

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