Originally Posted by thescreensavers
On my 2013 gauge and GPS is dead accurate at 75mph
My 96 and 04 both read fast. My 04 is dead accurate with 235-40-18 tires but with stock size it reads 3 mph fast at 60 mph. I have to add that every car I have owned read fast according to my GPS and the speed warning sign on the side of the road. Average on both my Fords is 2 mph fast.