I went and filled my truck up and the mileage on the compter said 12.9 but I hand calculated at 13.6mpg. I was happy. My wifes Sienna has an on board calculator and its always way off. I used it a couple of times and it was an optimistic computer by over 2mpg.

 

I have a friend of mine who has an 04 Chrysler 300-c Hemi. He get's 18 arounmd town and 21 on the open road. My 04 hemi quad cab 4x4 get's 12 tpo 13 city and 17 to 18 on the open road. I average 15 .5 to 16.0 most of the time. general driving.Mostly non local but non highway together.