I own a 2013 Dart Raylee. The MPG indicated by the trip computer has been as much as 40% higher than when I compute the MPG the old fashion way after filling the tank. My wife owns a 2013 Honda CR-V with a trip computer that is never more than a few tenths of an MPG different from computing it yourself. I took the car to the dealer where I purchased it to have the trip computer fixed. The first thing that happened was I got quized about using it properly, did I always delete the past miles traveled, did I delete the past computed MPG, did I restart the MPG computation before filling the tank, did I fill the tank the same way all the time, etc. The dealer could not tell me what the expected accuracy of the trip computer is supposed to be. After about 30 minutes of discussion they finally agreed to keep the car and see what they could do. When I got the car back they had loaded upgraded code for transmission control and for the trip computer. Since the new code download the overall MPG is about 20% lower than prior to the new transmission code upgrade and the computed MPG compared to the self calculated MPG is about 2x as much in error on average. Has anyothre Dart owner experienced this problem with the trip computer in their Dart? I'm getting ready to get rid of the DART and get a small AWD SUV.