Using the average when you buy a used car

Multiply the car's age by about 7,000 and compare. A 2018 car showing 90,000 miles has lived a harder life than average; the same car on 35,000 has been barely used. Neither is automatically good or bad, but each should shape the questions you ask.

Motorway miles wear a car far more gently than the same distance around town, and a well-serviced high-mileage car routinely outlasts a neglected low-mileage one. Our guide to good mileage on a used car goes through the judgement in detail.

Whatever the advert says, verify it. Every MOT records the odometer, so the free MOT check shows the real mileage trail, and a reading that ever goes backwards is the classic sign of clocking.

The £5.00 report puts the trail on a chart and flags anomalies, and mileage feeds straight into what a car is worth, which our depreciation calculator can show you.