So since I have gotten the Expy I have felt like the speedo is slow because going the speed I used to go in my old car had people riding my tail and that has never happened. I used a GPS app to check the speed and it is off by 2 mph at nearly every speed. I checked the app against other vehicles and a roadside cop sign that shows your speed and it is dead on. Anyone else have this issue? Would that be a warranty fix? Also, wouldn't that increase my mileage? At 60 mph it is 2 mph and actually going 58. If that's the case my car is over 3% off on the mileage. At this point that could be 1,000 miles!! Any thoughts?