checkthemiles.com · free
A rolled-back odometer resets one number. It can’t reset the twelve places a car records its own mileage. Twelve checks, about fifteen minutes, no account, no charge.
Six checks need nothing but your eyes. Four need a hand on the part. Two need a $30 borescope through the spark plug hole — those two carry the most weight, because honing marks in a cylinder cannot be put back. Skip what you can’t reach; the read still works.