People often want one number: every 10,000 km, every year, something like that. It is a reasonable thing to want and an unhelpful thing to give, because service intervals vary enormously between manufacturers, between engines from the same manufacturer, and between markets. A figure that is right for one car can be double what another needs.
So rather than invent an average, this guide explains how to find your real schedule and how to read it properly.
Where your schedule actually lives
In order of authority:
- The service booklet or maintenance schedule supplied with the car. This is the document a workshop stamps and a warranty claim refers to.
- The owner’s manual, which almost always contains the same schedule, often as a table near the back.
- The manufacturer’s own service page or app for your market, which reflects any revisions.
- The service reminder in the car itself, which on many modern cars calculates the next due date from how the car has actually been driven.
A workshop’s recommendation is not the same thing as the manufacturer’s schedule, and neither is a figure from a forum.
How to read the schedule
Two things trip people up.
Distance or time, whichever comes first. A schedule written as “every 10,000 km or 12 months” means exactly that. A car doing 4,000 km a year still needs its yearly service, because oil degrades with time and moisture, brake fluid absorbs water from the air, and rubber ages regardless of use.
Normal use versus severe use. Most manufacturers publish a second, shorter schedule for demanding conditions, and most owners never notice it exists. Severe use typically includes:
- Frequent short trips where the engine never fully warms up
- Extended idling and stop-start traffic
- Dusty conditions
- Sustained high ambient temperatures
- Hilly terrain, heavy loads or towing
A city car in Indian traffic meets several of those on an ordinary week. If that describes your driving, the severe-use column is the one that applies to you, not the headline figure.
What a service usually covers
The exact list is set by your schedule, but most include some combination of:
- Engine oil and oil filter
- Air filter and cabin air filter
- Fuel filter, particularly on diesels
- Spark plugs at their own longer interval
- Brake fluid, on a time basis rather than distance
- Coolant, at a long interval that still matters
- Transmission fluid, where the manufacturer specifies a change
- Brake pad, disc and hose inspection
- Tyre condition, pressures and rotation
- Suspension, steering and exhaust inspection
- Battery condition
- Lights, wipers and washer operation
- Software updates on newer cars
Timing belts deserve their own note. Where an engine uses a belt rather than a chain, it has a replacement interval in both distance and years, and a belt that fails usually destroys the engine. It is the one interval never worth stretching. Whether your engine has a belt or a chain is in the manual.
Why keeping to it is worth the money
- Warranty. Manufacturers can decline claims where the schedule was not followed, and stamps or digital records are the evidence.
- Resale. A complete service history is one of the few things that reliably affects what a used car sells for.
- Cost. Almost every expensive mechanical failure has a cheaper inspection that would have caught it.
The service reminder is a reminder, not a diagnosis
The spanner symbol or “service due” message tells you the schedule has come around. It is not a fault light, and resetting it does not service the car. Equally, a car with no reminder lit can still be due — reminders are set up at the last service and can be configured wrongly.
Electric cars
Electric cars have schedules too. They skip oil, filters and plugs, but they still require brake inspection and fluid, cabin filters, tyres, suspension, coolant for the battery and motor systems, and software maintenance. Shorter list, not no list.
Your manual has the final word
Intervals, severe-use definitions, fluid specifications and the items covered at each service are specific to your exact model, engine and market. Where this guide and your service booklet disagree, the booklet wins — and it is the document your warranty is judged against.
