Short answer: Service your car at the time or distance interval in your owner's manual, whichever comes first. Singapore's short trips, stop-start traffic and heat match what many manuals call severe service, so a shorter oil change interval is often sensible.
Time or distance, whichever comes first
Every owner's manual gives a service interval in both months and kilometres. Oil ages even when the car is not driven much, so a low-mileage car still needs servicing on time.
Why Singapore driving is "severe"
Most manuals list conditions that call for a shorter schedule: frequent short trips, extended idling, stop-start traffic and high outside temperatures. Daily driving in Singapore ticks several of these boxes. If that describes your driving, follow the severe-service schedule or shorten the oil change interval.
Service indicators on European cars
Many Mercedes-Benz, BMW and Volkswagen group cars calculate when the next service is due and show it on the dashboard, alternating between a smaller and a larger service. The indicator is a useful guide, but the hard-use conditions above still apply.
Use the right oil, not just the right thickness
Modern engines need oil that meets the car maker's approval, for example MB 229.5 or 229.51 for many Mercedes-Benz engines, or VW 504 00 or 507 00 for many Volkswagen group engines. The approval is in your owner's manual and printed on the oil bottle.
More than oil
A proper service also covers filters, brake fluid, coolant, spark plugs and a safety inspection at the intervals your maker sets. Keep the receipts: a complete service history helps when you sell the car.
