Mileage is the first number most UK car buyers look at — and the one most likely to scare them off the wrong cars and toward the wrong ones. Here's how to think about it properly.
The UK Average
The average UK driver covers around 7,000–8,000 miles a year. That gives you a rough baseline for what's "normal" mileage at a given age:
- 3-year-old car: ~22,000 miles is average
- 5-year-old car: ~37,000 miles is average
- 8-year-old car: ~60,000 miles is average
- 10-year-old car: ~75,000 miles is average
A car significantly above this is "high mileage" for its age; significantly below is "low mileage."
Why Low Mileage Isn't Always Better
Counterintuitively, very low mileage can be a problem. A 10-year-old car with 20,000 miles has spent most of its life sitting still — and that's hard on a car. Seals dry out, brakes seize, fuel goes stale, batteries fail. Cars are designed to be used.
If you see a 10-year-old car with very low miles, ask why. Sometimes it's a genuine elderly second-car situation. Sometimes it's that the car has spent years off the road with major problems.
Why High Mileage Isn't Always Worse
Motorway miles are the easiest miles a car can do. A car with 120,000 miles that's commuted between two cities daily has had a much gentler life than a car with 60,000 miles of urban stop-start driving.
Modern cars are built to handle 150,000+ miles routinely. Many diesels are barely run-in at 100,000.
What Actually Matters More Than Mileage
- Service history. A high-mileage car with full main dealer history is in much better shape than a low-mileage car with no records.
- How recent the miles are. A car that's done 90,000 miles over 10 years is normal. A car that's done 90,000 over 4 years has been hammered.
- Type of use. Motorway-dominant > mixed > urban-dominant > short hops only.
- Condition of consumables. Tyres, brakes, suspension, exhaust. These tell you how it's been treated.
- Cambelt status. On belt-driven engines, an unchanged 100,000-mile cambelt is a £600–£1,200 immediate cost.
Mileage by Engine Type
Petrol
Modern petrol engines comfortably handle 150,000+ miles with proper maintenance. 80,000–100,000 is mid-life, not end-of-life.
Diesel
Diesels last longer than petrols on average — 200,000+ is not unusual. But they only thrive on long, hot runs. A diesel that's done 50,000 short urban miles can be in worse shape than one with 150,000 motorway miles.
Hybrid
Hybrids are remarkably durable. Toyota's hybrid drivetrain regularly does 250,000 miles in taxis. The battery is the wear item, not the engine.
Electric
EV mileage matters less than battery state of health. A 60,000-mile EV with 95% battery health is in much better shape than a 30,000-mile one at 82%.
The Bottom Line
Don't treat mileage as a one-number summary of a car's condition. A low-mileage car with no service history is a riskier buy than a high-mileage one with full records. Read the whole picture, not just the odometer.