I always know what my odometer reads. I have a fixation for monitoring how many miles are on my truck and all the other vehicles I have owned. Back in September of 2017 my trucks odometer reading jumped to 38,000 miles ,up from 27500 for no apparent reason. Do not have a clue why. Do you? My mileage on my truck now is 48,289 miles. My mileage has not jumped since that one time. I do not drive this truck that often.