It is one of the most repeated questions among drivers, especially when the odometer starts approaching six-digit figures: how many kilometers can a car really last before it starts having serious problems? The answer depends on more factors than it might seem.
How many kilometers does a combustion car last on average?
A modern internal combustion car has, on average, a service life of between 250,000 and 300,000 kilometers. That said, this figure is not a fixed ceiling: with strict preventive maintenance and good driving habits, it is not uncommon for a vehicle to comfortably exceed 500,000 kilometers before needing a major engine repair.
In Spain, in fact, the average age of the car fleet is already around 12–14 years, largely because many owners are extending the life of their current car rather than replacing it. As a rough reference, various industry experts place around 320,000 kilometers as the point from which it is worth starting to assess whether it makes sense to keep investing in the vehicle or to change cars.
Does the type of engine affect longevity?
Yes, and quite significantly. Petrol engines typically fall within the usual range of 250,000 to 300,000 km, while diesel engines, due to their more robust construction, tend to handle more mileage if they receive proper maintenance.
| Factor | How it affects service life |
|---|---|
| Engine type | Diesel generally more durable than petrol |
| Maintenance | Oil changes, filters and original parts extend engine life |
| Driving style | Smooth driving reduces mechanical wear |
| Usage environment | Urban traffic wears more than road driving |
| Climate and parking | Garage protects plastics and the electrical system |
| Model and manufacturer | Parts quality varies by brand |
What factors extend (or shorten) the life of a car?
The service life of a car can never be calculated with an exact formula, but there are variables that clearly have an influence:
- Maintenance: changing the oil on time, using original parts or guaranteed ones and checking the filters regularly is, by far, what extends engine life the most.
- Vehicle use: the more kilometers and hours of use the car accumulates, the greater the overall wear on its components.
- Driving style: driving smoothly, without sudden acceleration or harsh braking, reduces the wear on mechanical parts such as the clutch, the brakes or the transmission.
- Type of journey: urban driving, with constant stops and starts, wears the clutch and brakes more than long, steady road trips.
- Climate and parking location: a car exposed to the elements, with frequent rain or sharp temperature changes, ages faster. Keeping it in a garage protects the bodywork plastics and helps the wiring and sensors last much longer.
- Model and manufacturer: the quality of the materials and parts used in manufacturing also makes a difference; some models require workshop visits more frequently than others.
In summary: a well-maintained car, driven smoothly and kept in a garage can approach or even exceed 500,000 km, while a neglected car exposed to intensive urban use may start showing problems well before 250,000 km.
Why are cars lasting longer on the road?
The rising prices of new vehicles and the difficulty many owners face in changing their model is extending the average service life of the car fleet. Interestingly, many cars from previous generations were manufactured with materials of even higher quality than today's, although their safety levels no longer meet current required standards.
Frequently asked questions
From how many kilometers is a car considered old?
There is no official figure, but many experts place around 320,000 km as the point at which it is worth starting to assess whether it makes sense to keep investing in repairs or to change the vehicle.
Does a diesel engine last longer than a petrol one?
As a general rule yes, thanks to more robust construction, although maintenance remains the most decisive factor in both cases.
Can a car really reach 500,000 km?
Yes. With strict preventive maintenance, good driving habits and predominantly road use, it is not uncommon for some vehicles to reach or exceed that figure before needing a major engine repair.
Does parking on the street shorten the life of a car?
Yes, especially in rainy climates or with sharp temperature changes. Keeping the car in a garage protects the bodywork plastics and noticeably prolongs the life of the wiring and sensors.
Extending the life of your car using second-hand premium parts?
Yes, cars do have a service life, and replacing the right parts with premium ones at the right time will increase their service life as well as their performance.