To get back on pick-ups, I have a new 15 Ram crew cab, short bed, 4x4, Cummins, 6 spd manual, 3.42 gears with 275/70r18 firestone trans force HT tires (whew
). I have a little over 4k miles on it now and have been knocking down about 17.4 mpg in my mixed driving to/from work. My calc'd mileage is amazingly within a tenth or so of the lie-o-meter. Last week I put cab length steps on my truck similar to the "good" picture posted previously (post #17 by Vman455) and filled my tank the next day. 17.3 I think it was, great! Now, this tank is reading 16.2-ish give or take. I'm thinking my new steps have stolen about 1 mpg. I haven't made any other changes and hadn't thought it could be the steps. I guess I'll have to see if this tank is just off, or if my mpg stays in the 16's. Just thought I'd post up some real time insights.
Also, FWIW, I think the Ram 29 mpg claim is for a 2wd EcoDiesel.
Travis..