Thanks for information. Are you still experiencing this problem? Could you tell me the exact time and date that you reset your car odometer so that I can check for anomalies within that time period?
If not and if you're still interested in checking the accuracy of GOFAR, could you please repeat what you've done and let us know the exact time and dates between which you've performed measurements?
Our own internal testing has given results that show our system to be accurate at measuring distance to within a few percent.