Diesel cars
A diesel is a drivetrain for one kind of use, and outside it, it is the most expensive way to run a car. It wants distance under load: then it lasts, uses little and pulls heavy loads — for towing and long motorway runs there is still nothing better at the price. Short trips, purely urban use and long periods standing it resents, at components any one of which costs more than several years of fuel savings bring in. So the question is never whether a diesel is good but whether your route suits one.
What matters
- The sum is a difference calculation, and you can set it up yourself: the purchase premium plus the difference in vehicle tax, where that is assessed on capacity or emissions, against the saving per kilometre from the consumption gap and the price gap at the pump. Put in your own values and read off after how many kilometres the two lines cross — that crossing point is the answer, not a rule of thumb.
- On a diesel the emissions system is several components: the particulate filter, exhaust gas recirculation and, on newer cars, a catalyst using urea solution with its tank, pump and injector. Each needs operating temperature, and each is expensive on its own. So the question for the seller is not whether the car runs well but how it was driven.
- At high mileage two items come due that are worth knowing about: the dual-mass flywheel and the injectors. A diesel with many kilometres and unbroken servicing is still a good car — one with few kilometres from short-trip use is the opposite. Here low mileage is not an advantage but a pointer to exactly the use that harms this drivetrain.
- Where a diesel may be driven is decided by its emissions class, not by its year. Cities with access restrictions grade by class; which class a car carries is in its documents, and which class a particular city currently requires is published by that city. Check both before buying if you drive into such a centre regularly.
Nothing in stock for this selection right now
Carvexia is new and stock grows daily. Save the search — you will hear from us as soon as a matching car is listed.
Common questions
- Is a high-mileage diesel risky?
- The number on the odometer alone says little. What counts is the kind of kilometres and their documentation: motorway kilometres under steady load are the gentlest regime this engine knows, and an ex-sales-rep car with a complete service book is generally in better shape than a town car with half the mileage. Check the entries for even spacing, ask about oil consumption, and have the fault memory read out — interrupted filter regenerations are recorded there even when no lamp is on.
- Does a diesel lose value faster?
- Not everywhere to the same degree, and that is the point. In markets with many access restrictions the pool of buyers for older diesels has narrowed, and that shows first in how long a car sits and only afterwards in its price. In markets with long distances and little city-centre traffic demand is stable. For you that means two things: buy where supply is plentiful, and when selling allow for a diesel sitting longer than a comparable petrol car — or sell it into the market where it is wanted.