Quote:
Originally Posted by Zerohour
UG has a mileage calibration. :-) How new/old are you tires? a few fractions of an inch can cause a variation in the mileage from speedo cable an the mileage off of a electric impulse.
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I have it calibrated for mileage...
This last tank was off by less than a mile. The tank before, it was off by about 6 miles. The tank before was right on. If it was consistent, I could tune it out.
Differences in the tire due to wear over time will cause a deviation on the odomoter reading... but my dash and my UG will both have the same deviation as both are collecting data from the same signal.
Whatever the reason, it's only a small difference and doesn't affect the usefulness of the data.