How often should you service your car?

The baseline: 10,000 km or 1 year

Nearly every Indian passenger car sold in the last decade has the same default service interval: 10,000 km or 12 months, whichever comes first. Some premium cars stretch to 15,000 km; some older or commercial models compress to 5,000 km. Check your owner's manual or service book for the exact figure — the warranty terms require you to follow it.

The "whichever comes first" part matters. A car that does 3,000 km/year still needs an annual service, because engine oil, coolant, and rubber components degrade on a time schedule regardless of use. Skipping the annual on the basis of "I barely drove it" is a common and expensive mistake.

What a proper service actually covers

A good service isn't just an oil change. The manufacturer's service schedule prescribes a cascading set of checks and replacements, roughly:

Every service (~every 10,000 km / 1 yr)

• Engine oil + oil filter — the big one. Synthetic or semi-synthetic per manufacturer spec.
• Air filter inspection — replace if clogged (typically every 20,000-30,000 km).
• Cabin AC filter — inspect; replace at 10,000-15,000 km.
• Brake pad inspection + brake fluid level check.
• Tyre pressure + tread depth check across all four.
• Battery health — voltage, terminal cleaning.
• Coolant level + top-up if needed.
• Windscreen washer, wiper condition, all lights check.
• Under-car inspection — leaks, suspension components, exhaust mountings.

Periodic bigger-ticket items

• Spark plugs — every 40,000-80,000 km (varies by type — iridium plugs last longest).
• Brake fluid — every 2 years regardless of km (it absorbs moisture).
• Coolant flush — every 40,000-60,000 km or 4-5 years.
• Transmission fluid — MT every 60,000-80,000 km; AT varies (AMT at 40,000 km, CVT at 60,000 km, DCT per spec).
• Timing belt (interference engines) — every 90,000-1,00,000 km. Chain-driven engines skip this.
• Tyres — typically 40,000-60,000 km depending on driving style and rotation discipline.
• Battery — 3-5 years, depending on climate. Delhi / Rajasthan heat shortens battery life substantially.
• Brake pads — 30,000-50,000 km. Discs may need replacement every 80,000-1,20,000 km.

When to go shorter than the factory interval

• Heavy city stop-start — short trips, frequent idling, lots of first-gear work. Engine never fully warms up, oil collects more contaminants per km. 7,500 km is safer.
• Coastal cities — Mumbai, Chennai, Goa, Kochi, Visakhapatnam. Salt-laden air accelerates corrosion on suspension, brake lines, underbody components. An annual inspection of these items (even if you're under 10,000 km) is cheap insurance.
• Dusty environments — Rajasthan, parts of Delhi-NCR. Air filter and cabin filter need more-frequent replacement.
• Turbo-charged engines — most BS6 diesels, many modern petrols. Turbo components run hot; oil quality matters more. Shorter intervals (7,500 km) extend turbo life.
• New engine in break-in period — the very first service on a new car is usually at 1,000-1,500 km and is important to do on schedule.

When you can safely stretch the interval

Only in very narrow conditions:

• Predominantly highway driving at consistent speeds, warm climate, good roads.
• Using high-spec fully-synthetic oil that exceeds manufacturer minimum.
• Car under comprehensive warranty that explicitly allows longer intervals (rare in India).

Even then, 12,000 km is the sensible ceiling. Going beyond the manufacturer's stated maximum voids the warranty on engine-related claims — not worth the saving.

Authorised service centre vs local mechanic

During the warranty period (usually 2-3 years / 60,000-1,00,000 km), stick to the authorised service centre (ASC). Any failed claim under warranty requires documented ASC service history; missing or incomplete records is a common and fully-valid reason for claim rejection.

After warranty, a trusted local mechanic can often do a better job for 40-60% less. Trade-offs:

• ASC pros: OEM parts, factory-trained techs, software updates, diagnostic tools, consistent checklists. Service history supports resale.
• ASC cons: expensive on labour and parts (both often 50-80% more than local). Over-recommendation of replacements is common — many claimed "due" items aren't.
• Local mechanic pros: far cheaper, direct communication, flexibility on aftermarket parts.
• Local mechanic cons: uneven quality; wrong oil grades or counterfeit parts are real risks if you haven't vetted the shop. No diagnostic-tool access for complex electronics.

Rule of thumb: ASC while under warranty; trusted local mechanic for years 4-7; specialist workshop (transmission, engine) for big-ticket repairs thereafter.

What a service should cost

Indicative ranges for a periodic service on a mid-size Indian car (2026 prices):

• Routine service at ASC (oil, filter, inspection): ₹6,000-12,000
• Same service at local mechanic: ₹3,500-6,500
• Major service (service + brake pads + coolant flush + timing belt): ₹15,000-35,000
• Premium car service at ASC (BMW / Mercedes / Audi): ₹15,000-40,000 for routine, ₹60,000-1,50,000 for major

Always ask for an itemised estimate before work begins, and request any replaced parts (even old filters) be shown to you. This one habit cuts over-recommendations dramatically.