Howdy all, i just bought a used 07 extended 3.0 sprinter diesel. was just wondering what the 07s are getting, economy wise, my first trip with the sprinter was a 500 mile run, and i didnt get 400 miles b4 filling up, i thought it would have gave me better then that, my load was only 300 lbs, and there wasnt any wind, and all flat driving, my ave speed was 65. all your help would be greatly appreciated.....