How Often Should You Service Your Car?

Published 3 days ago

Most people know they should service their car regularly. Far fewer actually know what "regularly" means for their specific car - and that gap is where expensive problems start.

Here's the short answer: every 12 months or 10,000-15,000km, whichever comes first. But that's the general rule, and general rules don't account for European cars, Brisbane's climate, your driving habits, or the fact that some manufacturers have moved to condition-based servicing altogether.

If you drive a Mercedes, BMW, Audi, VW or Porsche, keep reading - because the answer is more specific, and getting it wrong costs more.

The General Rule (and Why It's a Starting Point, Not a Finish Line)

For most modern Australian cars, the standard service interval is:

Every 10,000-15,000km, or
Every 12 months, whichever comes first

The "whichever comes first" part matters. A car that only does 5,000km a year still needs a service annually. Oil degrades over time, not just through kilometres. Moisture builds up. Rubber components age. A car sitting mostly in a driveway in Brisbane's humidity isn't having an easy life, even if the odometer barely moves.

Low-km drivers make this mistake constantly. We see it every week at our workshop in Coopers Plains - someone brings in a car that's only done 8,000km in 18 months and wonders why it's running rough. The oil's sludged, and the service is well overdue.

European Cars: Brand-by-Brand Service Intervals

This is where things get more specific - and where a lot of drivers get caught out. European manufacturers don't all follow the same schedule, and some have moved well away from the traditional "every 12 months" approach.

Mercedes-Benz

Mercedes uses a Flexible Service System (FSS) that calculates intervals based on your actual driving conditions. In practice, that usually means:

10,000-15,000km or 12 months, whichever comes first

Alternating between Service A (minor) and Service B (major)

The car's computer tracks oil condition, driving patterns and other factors to prompt you when a service is due. Don't wait until you're hundreds of kilometres past the reminder - the system is doing the maths on degradation, not just counting clicks.

We specialise in Mercedes-Benz servicing and see plenty of FSS-equipped cars that owners have stretched well past the recommended interval because "the light hasn't come on yet." The light is a prompt, not a deadline.

BMW

BMW's Condition Based Servicing (CBS) is the most sophisticated monitoring system of the lot. Rather than fixed intervals, it tracks:

Oil condition
Brake pad wear
Coolant health
Spark plug life
Vehicle inspection schedule

The car tells you what it needs and when. That's genuinely useful - but it doesn't mean you ignore it. CBS recommendations are the minimum, and if you're doing a lot of short trips, stop-start city driving, or towing, we'd suggest erring on the side of earlier.

For BMW drivers on the Southside, our BMW Servicing team can pull your CBS status and tell you exactly where each component sits - not just what the dashboard shows.

Audi

Audi service intervals depend on the age and platform of your car:

Older models (pre-2015, PQ platform) - 10,000km or 12 months, whichever comes first
Newer models (A3 8V+, A4 B9+, Q5 FY+ onwards) - 15,000km or 12 months, whichever comes first
Both alternate between minor and major services

The shift to 15,000km came with a newer engine and oil technology on Audi's updated platforms. If you're not sure which interval applies to your car, check your service book or ask us - we'll confirm based on your model and year.

Audi Servicing at an independent European specialist like ours means you get the same quality and diagnostic capability as a dealer - without the dealer price tag or the unnecessary upsells.

Volkswagen

VW follows the same platform logic as Audi, so the interval depends on your model's age:

Older models (pre-Golf 7, roughly 2012 and earlier) - 10,000km or 12 months
Newer MQB platform models (Golf 7+, Tiguan 2016+, T-Cross, T-Roc, Passat B8) - 15,000km or 12 months

The jump to 15,000km came with VW's MQB platform and improved synthetic oil specs. If your VW is older or you're unsure, stick to 10,000km - it's never wrong to service earlier, just don't go later than the manufacturer says.

One thing to watch with VW: the 1.4 TSI and 1.8 TSI engines have known oil consumption issues, particularly on higher-mileage cars. If you're driving a Golf, Tiguan or Passat with one of these engines, check your oil level between services - don't just wait for the dash light.

More on Volkswagen Servicing on our services page.

Porsche

Porsche intervals vary more by model than the others:

12 months or 15,000-20,000km, depending on the model and year
911s and Caymans on synthetic oil can sometimes stretch to 20,000km
Macan and Cayenne SUVs typically sit at 15,000km

Porsche's engineering tolerances are tight. Oil quality matters enormously - these engines are built to a standard where using the wrong spec oil, or running it too long, causes wear that only becomes visible much later. Not scare tactics, just physics.

We handle Porsche Servicing regularly and use only manufacturer-approved lubricants and parts.

Factors That Change Your Schedule

Even with a brand-specific interval in mind, your actual driving life might push that date forward.

Brisbane's climate

Heat accelerates oil degradation. A car doing the same kilometres in Brisbane versus Hobart is working its oil harder. If you're regularly sitting in traffic on the Pacific Motorway or doing school runs in 35-degree heat, your oil is aging faster than the interval assumes.

City driving vs highway

Short trips are harder on a car than highway driving. The engine doesn't reach full operating temperature, moisture builds up in the oil, and components that need heat to work properly don't get there. If your weekly driving is mostly suburbs and school zones, consider servicing closer to the 10,000km mark rather than stretching to 15,000km.

Towing

Towing puts everything under higher load - engine, transmission, brakes, suspension. If you're regularly pulling a trailer, boat or caravan, service intervals should tighten up. We'd typically recommend dropping to 10,000km or less.

Age of the vehicle

Older cars need more attention, full stop. Seals, gaskets and rubber components degrade over time regardless of kilometres. A 10-year-old European car on 80,000km needs more frequent checks than a new car at the same mileage. Annual servicing becomes even more important.

Modifications or track use

If you're running your car harder than standard - track days, spirited driving, remaps - the standard intervals don't apply. Talk to your workshop about what makes sense.

What Actually Happens During a Service

A lot of people aren't sure what a service covers, which makes it harder to understand why you can't skip one. Here's what a standard service includes:

Oil and filter change - The core of every service. Fresh oil protects engine internals; old oil stops doing its job and starts creating sludge.
Fluid checks and top-ups - Brake fluid, coolant, power steering, windscreen washer, transmission fluid where accessible.
Filter replacements - Air filter, cabin filter (if due). These affect both engine performance and air quality inside the car.
Brake inspection - Pad thickness, rotor condition, caliper function. You want to know about brake wear before it becomes a problem.
Tyre check - Pressure, tread depth, wear patterns. Uneven wear often points to alignment or suspension issues worth addressing early.
Visual inspection - A good technician walks under the car and around it. Leaks, cracked boots, worn bushings, corroded brake lines - things that don't show up on a diagnostic scan but matter a lot.
Diagnostic scan - For European cars, especially, we run a full system scan to pick up any fault codes that haven't triggered a dash warning yet. This is part of every service at Accelerate and is one of the reasons [diagnostics](/services/diagnostics/) matter as much as the physical work.

The full picture is on our Servicing Page.

What Happens When You Skip Services

We're not going to catastrophise, but we do want to be straight with you.

Oil breakdown - Oil that's been in too long loses viscosity and starts breaking down. Metal-on-metal contact increases. Wear is cumulative and largely invisible until it's expensive.
Timing chain issues - This is the big one for European cars. Timing chains on certain Mercedes, BMW and Audi engines need clean, fresh oil to stay properly lubricated. Stretched or jumped timing chains mean engine rebuilds, not service bills. We wrote about exactly this in our [Mercedes timing chain failure article](/magazine/advice/mercedes-timing-chain-failure/) - it's worth five minutes of your time.
Brake fade or failure - Brake fluid absorbs moisture over time. Old fluid has a lower boiling point, which means brake fade under hard use. That's not a scenario you want to find out about going down a hill.
Warranty and resale - Incomplete service history hits resale value hard, especially for European cars, where buyers know what to look for. A full logbook history is worth real money.
Small problems become big ones - The inspection that catches a cracked CV boot or a weeping coolant hose at $150 is the inspection that prevents a $2,000 repair six months later.