How often should a diesel vehicle be serviced?
A general guide to how diesel service intervals are structured, why they differ from petrol, and how to find the exact schedule for your specific vehicle.
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How diesel service intervals are set
Manufacturers set service intervals in kilometres (or miles) and in months. Whichever limit you hit first is the one that triggers the service. A low-mileage diesel can still be due on time alone.
Severe-duty conditions — heavy loads, towing, extreme temperatures, lots of short trips, dusty environments — often trigger a shorter interval defined by the manufacturer.
Why diesels are different from petrol
- Diesel fuel filters need regular replacement to protect the high-pressure injection system.
- Water separators in the fuel system need draining as per schedule.
- Modern diesels with particulate filters (DPFs) benefit from regular longer drives at operating temperature.
- Engine oil grades and change intervals are specific to the engine, especially on DPF-equipped vehicles.
Finding your specific schedule
The exact schedule for your vehicle is printed in your owner's manual and service booklet, and repeated by authorised dealers. Once you have it, enter it in VehicleIQ and we'll remind you before every service.
Frequently asked questions
Is 'severe duty' just marketing?
No — most manufacturers define severe-duty conditions in the owner's manual and mandate shorter intervals when they apply. If you tow, drive off-road or do lots of short trips, check whether you fall under this category.
Does a diesel need to be driven for long distances?
Modern diesels with particulate filters generally do benefit from occasional longer drives at motorway speeds so the filter can regenerate. Purely short-trip use can lead to DPF issues over time.
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