I was driving and the speedo seemed fast. So I slowed down to the speed limit and people started passing me. In California getting passed when doing the speed limit is normal, but here in Idaho lots of people do the speed limt and slower. So my wife drove the Focus while I paced it with my mustang and the Focus showed 50 when the mustang was doing 45. The mustang is correct within 1 mph according to my many speeding tickets. I took it to the dealer and they said that up to +6 mph reading is within Ford's normal range. I just bought the car new a month ago and it is still stock, so I know it is not my wheel and tire combo. Anyone else have this problem?