Car servicing intervals: time vs miles
Why low-mileage cars still need annual services, and when to push the interval out.
Service intervals are set by the manufacturer in two ways: time and miles. Whichever comes first triggers the service.
Typical intervals (most modern cars)
- Interim service: every 12 months OR 10,000 km
- Full service: every 24 months OR 20,000 km
- Brake fluid renewal: every 24 months
- Cabin filter: every 12,000 km
- Spark plugs (petrol): every 60,000 km
- Timing belt: every 60,000–100,000 km depending on engine — see your handbook
Why low-mileage cars still need servicing
Engine oil degrades over time even when the engine isn’t running. Moisture and combustion blow-by collect in the sump; acid forms; bearings wear faster. A car driven 4,000 km in a year on short city trips is harder on its oil than a motorway car at 30,000 km — short trips never get the oil hot enough to evaporate the moisture out.
Rule of thumb: if the car hasn’t been serviced in 12 months, book it. Don’t wait for the mileage interval to hit.
When to push intervals out
If you have a known long-life service schedule (e.g. some BMW Inspection-II at 30,000 km, some VAG LongLife at up to 30,000 km on motorway-driven cars), you can stretch — but only if:
- The manufacturer service schedule explicitly says so
- You’re driving long-distance (motorway), not stop-start city
- You’re using the manufacturer-specified long-life oil
For everyone else, 12 months / 10,000 km is the safe default.
Book a service at the next interval — phone 01 847 5146.