Choosing a car

What car mileage is safe to buy: how many km is too much

“Too high a mileage” writes off many a good car in buyers’ eyes — and conversely, a “suspiciously low” odometer can hide serious risk. The truth is that the number alone tells you little. Whether the mileage is safe is decided by its authenticity, service history and how the car was used — not a round figure. Below: how many kilometres really count as “a lot” for different drivetrains, how to relate mileage to the car’s age, and how to spot a clocked odometer before you pay.

In short: the average car in Poland does ~13,000 km a year (median 10,000). A petrol engine typically lasts 300,000–400,000 km, a diesel often 400,000–500,000. A well-kept car at 200,000 km can be a better buy than a neglected one at 100,000. “Too much” is always when you can’t confirm how that mileage was built up.

The overriding rule: not how much, but how

Low mileage is tempting because it suggests less wear. But what’s decisive is technical condition and documented history, not the figure on the dial. A car over 200,000 km, serviced regularly (oil changed every ~10,000 km), can be a safer investment than a neglected example that has done only 100,000. How it was driven changes everything: 200,000 km done mostly on the motorway wears a car less than half that distance in a purely urban stop-start cycle.

How long each drivetrain lasts

“A lot” means something different for each engine type:

Petrol — average endurance to a major overhaul is 300,000–400,000 km. Simple design, cheap servicing.
Diesel — a modern one can cover 400,000–500,000 km; 250,000 is only half-life for many units. But expensive ancillaries (injection, DPF, turbo) cost when neglected.
LPG — a conversion usually signals intensive use (high annual mileage), which isn’t a flaw in itself if the car was serviced.
Hybrid / EV — here the battery condition matters most, not the mileage itself; assess the cells, not just the odometer.

How to relate mileage to the car’s age

The simplest plausibility test: multiply the car’s age by ~13,000 km. A 7-year-old car “should” have roughly 90,000 km. A big shortfall is a red flag — either the car sat idle (which harms seals, suspension, battery) or the odometer was wound back. A figure above average can be better, if it’s motorway kilometres with a full service history.

Beware the other extreme: a 10-year-old car with 50,000 km isn’t always a “gem” — long periods of standing damage parts that like to work. Relate mileage to age and to condition.

Clocked odometers — the scale of the problem and how to spot it

It’s still a real problem. Per autoDNA data, around 62,000 wound-back odometers are detected each year, and depending on the model a 10,000 km difference can mean tens of thousands of złoty in value — which is why it pays fraudsters. From 2026 the police also check mileage during routine stops. How to protect yourself:

Relate the odometer to age — as above.
Check the interior — a worn steering wheel, rubbed pedals and a sagging seat on a “low” mileage are a classic sign.
Listen to the engine — rough running, jerks and a “cough” don’t fit a low odometer.
Check the reading history by VIN — the most reliable method: if the car had more km in Germany four years ago than it claims today, the odometer was almost certainly wound back.

Check this car’s mileage history and real value by VIN → VARTOCAR report 49 zł
Value the listed car — before you pay →

What mileage to buy — a practical recommendation

Rather than fearing the number, follow the principle: the mileage must be authentic and documented. For most buyers a sensible compromise is a 3–7-year-old car with mileage in line with its age and a full service history. Accept higher mileage when you have evidence of care; treat low mileage with caution when you can’t confirm it. Before you pay, check the history and real value of the specific example — the same source that reveals a clocked odometer also tells you whether the price is fair.

This material is informational. The endurance figures and averages are typical market values — real longevity depends on the model, engine, servicing and driving style. Before buying, verify the mileage and condition of the specific example.

Financing the purchase? Calculate the loan or lease payment: Finumero →

Frequently asked questions (FAQ)

What car mileage is safe to buy? Safe means authentic, documented mileage in line with the car’s age and backed by service history — not a specific round number. A well-kept car at 200,000 km can be a better buy than a neglected one at 100,000. “Too much” is when you can’t confirm how the mileage was built up.

How many kilometres does an engine last? A petrol engine averages 300,000–400,000 km to a major overhaul, and a modern diesel often 400,000–500,000 km, provided it was serviced to the manufacturer’s schedule. Service history and use matter more than the number itself.

What is the average annual mileage in Poland? The average car in Poland covers about 13,000 km a year, with a median of about 10,000 km. It’s a good benchmark: a 7-year-old car should have roughly 90,000 km.

How do you check if an odometer was wound back? Relate the mileage to the car’s age and interior condition (wheel, pedals, seat), listen to the engine, and above all check the reading history by VIN. If an earlier reading is higher than today’s claimed mileage, the odometer was almost certainly wound back.