Quote:
Originally Posted by dkjones96
Over 100 miles of road the car got ahead by 2 tenths of a mile. So it is only .2% fast which I didn't really think any cars did except police speedos.
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Keep in mind that the speedo and odometer are separate devices, and can have different degrees of calibration. I did a similar check-the-mile-markers test in my CRX and found my odometer to be accurate within 0.3-0.4%, but according to GPS readings, the speedo reads 6-7% fast. This seems to be a common artifact in Honda speedos, which has led some people speculate that they are intentionally calibrated to read fast. Why? We're in the US... If the speedo read slow, somebody would surely sue when they got a speeding ticket.
dkjones96 
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