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Central Iowa | Just running around from farm to farm I will get 15 and around 18 on the highway. I do know they get worse the newer they get my 03 was alot better then my 05 and my 08 is by far the worst. And sorry to say but iseedit I think your full of it if your getting that kind of mileage on a stock 06 you must be lucky and have the only one in the world
 (2008 Duramax.jpg)
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 2008 Duramax.jpg (97KB - 66 downloads)
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duramax diesel fuel milage and chipping?
