Speedometer Error

[Flavor 987S]

Originally Posted by DFW02S

For Porsche, that little error in the 3 to 4% range saves them on warranty repairs, the miles go on just a wee bit faster.

I bet their accounting group knows exactly how much they save through this method.
Of course, it could be just tire variance, right?

Myth. Urban ledgend. The mileage on your DME is very accurate. And this is used for warranty claims. You should request a DME scan the next time your at the dealership or from someone who can read it.