MotR
Servicing · UK Guide

How Often Should You Service Your Car?

Service intervals vary by manufacturer, car age, and how you drive. This guide cuts through the confusion and tells you exactly when your car needs attention.

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How Often Should You Service Your Car?
The short answer

12 months or 12,000 miles — whichever comes first

Most cars should be serviced every 12 months or 12,000 miles — whichever comes first. Modern cars with variable service systems may extend this to 18,000 miles for motorway drivers, but annual servicing is the safest baseline. City drivers making frequent short trips should consider servicing every 6 months due to accelerated oil degradation.

Intervals by type

Service Intervals by Car Type

Car type / useRecommended intervalNotes
Modern petrol/diesel (fixed interval)12 months or 12,000 milesWhichever comes first
Variable service interval (e.g. BMW CBS)When dashboard indicates, max 2 yearsNever exceed manufacturer max
High-mileage motorway driverUp to 18,000 miles if using LongLife oilCheck handbook for LongLife spec
City/urban driver — frequent short tripsEvery 6 months or 6,000 milesShort trips degrade oil faster
Classic or older car (pre-2000)Every 6 months or 6,000 milesOlder engines tolerate less
Diesel with DPF filter12 months or 10,000–12,000 milesUse correct specification oil
Electric vehicleAnnual inspection (no engine service)Brakes, tyres, cabin filter
Skipping a service

What Happens If You Skip A Service?

Skipping a service is not a neutral act. Engine oil degrades over time and with heat cycling. By 15,000 miles without a change, it is typically heavily oxidised, contaminated with combustion by-products, and no longer providing adequate lubrication. The consequences compound quickly:

Degraded oil causes premature engine wear — especially to camshafts and bearing surfaces
Missed timing belt check — a failed belt on an interference engine destroys the entire top end
Degraded brake fluid absorbs moisture over time, reducing boiling point and braking effectiveness
Clogged air and cabin filters reduce engine efficiency and air quality
Coolant corrosion inhibitors deplete, accelerating radiator and head gasket wear
Missed advisory items grow into expensive repairs or MOT failures

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Questions & answers

Frequently Asked Questions

How often should I service my car?
The standard recommendation for most modern cars is every 12 months or 12,000 miles, whichever comes first. Some manufacturer variable service systems extend this to 18,000–20,000 miles for motorway drivers, but every 12 months as a minimum is good practice regardless of mileage.
Can I skip a service if my car seems fine?
No. Many service items — degraded brake fluid, a timing belt approaching its interval, a clogged fuel filter — give no obvious symptoms until they cause a failure. Servicing is preventative maintenance, not reactive repair. A missed service costs far less than a breakdown or engine failure.
Does frequent short-trip driving affect service intervals?
Yes, significantly. Short trips (under 5 miles) prevent the engine reaching full operating temperature, leading to condensation and fuel dilution in the oil. Drivers who regularly make short journeys should service more frequently — consider every 6 months rather than annually.
What is a variable service interval system?
Systems like BMW's Condition Based Servicing (CBS) or Volkswagen Group's LongLife Servicing use oil quality sensors and driving pattern data to calculate when a service is actually due. The dashboard displays a countdown. These can extend intervals to 18,000 miles but should not exceed the manufacturer's stated maximum.
Does servicing affect my MOT?
Not directly — an MOT tests roadworthiness at a single point in time. However, a well-serviced car is far less likely to develop the faults that cause MOT failures: worn brake pads, failing lights, perished rubber components, and fluid-related issues are all caught during routine servicing.
Does missing a service void my warranty?
If your car is under manufacturer warranty, missing a service can void the warranty for issues related to the missed maintenance. For cars out of warranty, missing a service does not create any legal liability, but it does increase the risk of expensive mechanical failures.
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Service intervals vary by manufacturer and model — always confirm the exact interval in your owner's handbook. MotR is not affiliated with DVLA, DVSA or any vehicle manufacturer. Last reviewed 13 June 2026.

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