It is closer than your calculation if you reset it to zero at each fill up and note your avg then. Letting it calculate the average without resetting before a new fill up keeps the running avg from previous fill ups.Why not just do your own MPG calculations? The Focus seems pretty close but realistically dividing miles driven in one tank by the gallons put in at the fillup my average was lower than my actual MPG.
Shouldn't neutral still be using gas...? Or is that just not included in the car's fuel calculations?no, it was about 5 miles of downhill, had the car in neutral the entire time..it actually went way higher than that, but it would only show 99.9..it stayed there for 5 minutes after I put the car back into drive haha