Service intervals explained, and why the 15 000 km sticker may be wrong for you
11 March 2026 · 5 min read · Servicing
Manufacturer intervals assume ideal conditions. Here is how dust, short trips and stop-start traffic change what your car actually needs.
Two schedules exist
Most manufacturers publish a normal schedule and a severe-service schedule. Dealers quote the normal one. Severe conditions include heavy dust, frequent short trips where the engine never warms up, towing, sustained idling in traffic and consistently high loads.
Read honestly: a school run in Johannesburg traffic is severe service, not normal service.
What to shorten first
- Engine oil and filter: the single most valuable interval to shorten, especially on turbo engines
- Air filter: halve the interval if you drive dirt roads regularly
- Cabin filter: it is cheap and you breathe through it
- Brake fluid: every two years regardless of distance, because it absorbs moisture
The items people forget
Cambelts are time and distance based, and a failure destroys the engine. Coolant has a service life and old coolant corrodes water pumps and radiators. Automatic transmission fluid marked lifetime by the manufacturer often benefits from a drain and fill at 100 000 km, though on some gearboxes a full flush is risky, so ask a specialist rather than a generalist.
Keep the record
A folder of dated invoices showing correct parts and schedule protects your warranty, and adds real money at resale. Cars with a full service history sell faster and higher, every time.
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