I rarely drive our 2013 C70, but had occasion to put about 700 miles on it this weekend. I decided to measure the gas mileage the old fashioned way and compare it to the mpg display in the car, which I had a hard time believing. For one tank I measured 23.5 and the display showed 30.3. On another tank I measured 30.0 and the display showed 37.4. I can't believe it could be so far off. Are they all like this? I'm still very impressed with the mileage it gets though.

 

Yeah, same here. Annoying, my other cars have OBDII MPG readers that allow me to adjust the reading so I can get closer to the actual MPG of the vehicle. Made me very frustrated when I got my new car and it was so far off and unadjustable.

-Randy