Also, did your tyres change?
I get about 4% difference in speed between my new winter tyres and my older summer ones. (Comparing tachometer with GPS).
You car only knows the wheel revolutions per seconds. If the diameter is off, it will log wrong distances, and thus also wrong milage numbers.
I get about 4% difference in speed between my new winter tyres and my older summer ones. (Comparing tachometer with GPS).
You car only knows the wheel revolutions per seconds. If the diameter is off, it will log wrong distances, and thus also wrong milage numbers.
