How Often Should I Service My Car?

Most drivers know they should service their car regularly. Far fewer know exactly how often, or what "regularly" actually means for their specific vehicle and driving pattern. The answer depends on three things: your manufacturer's schedule, your annual mileage, and the type of driving you do. This guide gives you the numbers.

The Manufacturer Schedule Is Your Starting Point

Every car comes with a manufacturer-specified service schedule in the owner's handbook. This schedule sets out the minimum intervals — usually expressed as a time period, a mileage figure, or whichever comes first. For most modern petrol and diesel cars, the standard interval is 12 months or 12,000 miles. Some newer vehicles with long-life oil specifications extend this to 18 months or 18,000 miles.

The manufacturer schedule is a legal and warranty baseline, not a ceiling. Following it keeps your warranty valid and satisfies DVLA requirements, but it does not account for how hard you actually use the car. A taxi covering 40,000 miles a year needs servicing far more frequently than a retired driver covering 4,000.

The Three Service Types and When Each Applies

UK garages typically offer three tiers of service. Understanding what each covers helps you decide which one your car needs at any given interval.

The interim service is designed for high-mileage drivers who cover more than 12,000 miles a year. Rather than waiting a full year between oil changes, an interim service at the halfway point keeps the engine oil fresh and catches any developing issues early. For drivers covering fewer than 10,000 miles annually, an interim service is optional — a full annual service is sufficient.

Mileage Thresholds That Override the Calendar

Time-based intervals assume average annual mileage of around 10,000–12,000 miles. If you drive significantly more or less than this, adjust accordingly.

High-mileage drivers — anyone covering more than 15,000 miles a year — should treat the 6,000-mile mark as the oil change trigger regardless of how many months have passed. Engine oil degrades through use, not just through time. Combustion byproducts, moisture, and heat break down the oil's viscosity and protective properties. Waiting 12 months when you've already covered 18,000 miles means driving on degraded oil for the second half of that period.

Low-mileage drivers face the opposite problem. A car that covers only 3,000 miles a year still needs a service every 12 months. Engine oil absorbs moisture from short journeys and cold starts. Brake fluid absorbs water from the atmosphere over time, regardless of mileage. A car that sits unused for long periods develops its own set of issues — corrosion on brake discs, degraded rubber seals, battery discharge — that only a physical inspection will catch.

Driving Style and Conditions Matter More Than Most Drivers Realise

Manufacturers classify driving conditions into two categories: normal and severe. Most service schedules are written for normal conditions — motorway and A-road driving at steady speeds, moderate temperatures, regular use. Severe conditions shorten the effective life of engine oil and other consumables.

Severe conditions include predominantly short journeys (under five miles), frequent cold starts, stop-start urban driving, towing, driving in extreme heat or cold, and operating in dusty or hilly environments. If your daily driving fits any of these descriptions, the standard 12-month interval is too long. A six-month or 6,000-mile interval is more appropriate.

Short journeys are particularly damaging because the engine never reaches full operating temperature. At full temperature, moisture in the oil evaporates. On a short journey, it stays in the oil and accelerates corrosion of internal engine components. A car used exclusively for school runs and local errands accumulates far more wear per mile than one used mainly on motorways.

When Your Service Light Comes On

Most cars built after 2005 have a service interval indicator — a dashboard warning that appears when the car's onboard computer calculates that a service is due. These systems use a combination of mileage, time, and driving data (oil temperature, engine load, number of cold starts) to estimate oil degradation. They are more accurate than fixed-interval schedules for average drivers.

The service light is a prompt, not an emergency. You have a short window — typically two to four weeks — to book the service without causing damage. Ignoring it for months is a different matter. Once the oil is significantly degraded, the engine runs with inadequate lubrication, which accelerates wear on bearings, camshafts, and cylinder walls.

What Happens If You Miss a Service?

Missing one service by a few weeks is unlikely to cause immediate damage. Missing it by several months, or skipping it entirely, carries real risk. Engine oil that has exceeded its service life loses viscosity — it becomes thinner and less able to maintain the oil film between moving metal surfaces. The result is increased friction, heat, and wear.

Brake fluid is hygroscopic — it absorbs water from the atmosphere over time. As the water content increases, the fluid's boiling point drops. Under heavy braking, degraded brake fluid can boil, creating gas bubbles in the lines and causing a sudden loss of pedal pressure. This is not a theoretical risk; it is a documented cause of brake failure, particularly in older vehicles where the fluid has never been changed.

Air filters clogged with dust and debris restrict airflow to the engine, increasing fuel consumption and reducing power. Cabin filters in the same condition recirculate pollen, bacteria, and particulates through the ventilation system. Neither failure is dramatic, but both are progressive and entirely preventable.

Servicing and Your MOT: How They Interact

A service and an MOT are not the same thing and one does not replace the other. The MOT is a legal roadworthiness test that checks a specific list of safety-critical items — brakes, lights, tyres, steering, emissions. It does not check oil condition, coolant level, air filter condition, or any of the mechanical items covered by a service.

Many drivers book a service and an MOT together, which makes practical sense. A pre-MOT inspection beforehand identifies any items likely to cause a failure — worn brake pads, a cracked wiper blade, a bulb — so they can be fixed before the official test. At IQ Tyres, the pre-MOT inspection is priced at £30 and is credited against the cost of any repairs carried out.

Booking your service and MOT at the same time also means the car is on the ramp once, not twice. The technician can address service items and MOT-related repairs in a single visit, which saves time and often reduces the total labour cost.

New Cars and Manufacturer Warranties

If your car is under a manufacturer warranty, the service must be carried out at the correct intervals to keep the warranty valid. It does not need to be done at a main dealer — any VAT-registered garage using the correct specification oil and parts can carry out the service without voiding the warranty. This is confirmed by Block Exemption Regulations, which have applied in the UK since 2003.

The key requirement is that the service is recorded in the vehicle's service history — either the physical service book or the manufacturer's digital service record. At IQ Tyres, every service is documented and stamped, and we use manufacturer-approved oil specifications for all vehicles.

Electric and Hybrid Vehicles: Different Rules Apply

Fully electric vehicles have no engine oil, no oil filter, no spark plugs, and no exhaust system — which eliminates a significant portion of the traditional service checklist. However, EVs still require regular maintenance: brake fluid replacement (the hygroscopic issue applies regardless of drivetrain), tyre rotation and inspection, cabin filter replacement, coolant checks for the battery thermal management system, and software updates.

Hybrid vehicles follow a modified schedule. The combustion engine still requires oil changes, but the intervals are often longer because the engine runs less frequently. Check your specific model's handbook — hybrid service intervals vary significantly between manufacturers.

Related Reading

For more on what a full service actually involves, read our detailed guide: What Is Included in a Full Car Service? If your car is approaching its MOT date, the Pre-MOT Inspection guide explains what gets checked and what the most common failure points are. For the Vehicle Servicing page, you'll find our current pricing and what's included at each tier.