So, I've noticed that my speedometer reads 3-4mph faster than I am actually going. Hooked up a digital obdii reader as well and it reads slightly lower than the analog gauge. My concern: If the car thinks I am going faster than I actually am, is my odometer counting faster that it should?
I understand that it's not going to be perfect, but there must be an acceptable tolerance for accuracy. Any idea what that is before I go to my dealer?