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GPS will be more accurate, And many times, it is the Speedo guage that is wrong. I had the speed sensor on my BMW from the ODB-II port, and it matched the GPS. The speedo on the dash read high.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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