Automotive title research websites are the best choice for checking the mileage on used cars. Two websites that offer extensive vehicle background checks are AutoCheck.com and CarFax.com.
Vehicle history reports are derived from information found on police reports, insurance claims, title records and other public information. Mileage is often, but not always, recorded on these reports and records, leaving a trail of data for used car buyers to follow. Automotive title research websites consolidate this data into one report for a buyer. The buyer can review the report to check if the mileage records make sense chronologically and compare them to the mileage currently read on the car's odometer.