Originally Posted by TRCM
Just did a short trip tonight (115 miles) @ 55 mph towing my camper (~ 6000 lbs), and hand calc'd was 9.8, EVIC showed 10.0.
Return trip empty @ 60 mph hand calc'd came to 17.6, EVIC said 18.4.
I ain't getting the mpg everyone else is..what is up ? drove like grandma too !
Same trip last year in the Silverado I had (5.3 w/3.73 gears) got the same towing, but 19.4 empty. And the mpg calculator on it was ALWAYS within .1 of hand calc'd. So far, the Dodge is off by 5-10%. Only time it was less than 5% off was tonight when towing kinda heavy, and then it was off by 2%.
What rear ratio do you have? You get the same mileage I do, on average. I have the 3.92 rear. The 3.55s seem to do better.