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My 2007 Ram 2500 with the 6.7L started out around 14 MPG. Now it gets around 16. I have been tracking my fuel consumption very closely with an Excel spreadsheet. Here's a jpg of the spreadsheet; you may have to zoom in to read it: http://i394.photobucket.com/albums/p...2007RamMPG.jpg
My hat is off to you that is impressive you have the hole history of filling your truck with fuel. Where you got it how much you added your mileage. Very impressive..