Interim vs full service
An interim service is a lighter check, usually every six months or 6,000 miles, built around an oil and filter change. A full service is the annual one, roughly every 12 months or 12,000 miles, covering far more of the car. Your manufacturer’s schedule should always take priority.
Updated 14 October 2026
Interim service
Typically an engine oil and oil filter change, a check of fluid levels, lights, tyres, brakes, wipers and battery, and a visual inspection for leaks and obvious wear. It suits higher-mileage drivers who would otherwise go too long between oil changes.
Full service
Everything in an interim service, plus more detailed brake and suspension inspections, air filter replacement, a closer look at the steering, exhaust and cooling system, and often spark plugs or a fuel filter depending on the car and its age. Some garages offer a "major" service every two years that adds items such as brake fluid and cabin filter.
Service versus MOT
They are different things. The MOT is a legal minimum safety and emissions test. A service is preventive maintenance to keep the car healthy. A car can pass its MOT and still be overdue a service, and many people book both on the same day for convenience.
Warranty and history
You do not have to use a main dealer to keep a manufacturer warranty, as long as the work follows the manufacturer’s schedule and uses parts of matching quality. Keep every invoice: a stamped, complete service history adds value when you sell.
Odomint keeps your service records against the car, estimates when the next service is due from your mileage, and reminds you, and the full history goes into the sale pack when you come to sell.
Signs your car needs attention between services
A warning light on the dashboard. Squealing or grinding when braking. The car pulling to one side, or the steering wheel vibrating. A drop in fuel economy, a new smell, or oil spots where you park. None of these should wait for the next scheduled service.
Modern cars often have a service indicator that calculates the interval from how the car is driven. It is a useful guide, but it does not replace checking the oil level, tyre pressures and fluids yourself every few weeks.
Common questions
How often should I service my car?
Follow the manufacturer’s schedule. As a general guide, a full service every 12 months or 12,000 miles, with an interim service in between if you drive a lot.
Is a service the same as an MOT?
No. An MOT is a legal safety and emissions test; a service is maintenance. They are often booked together for convenience.
Do I need a main dealer service to keep my warranty?
No, as long as the service follows the manufacturer’s schedule and uses parts of matching quality, and you keep the records.
Check any car before you buy it
MOT history, every advisory and the full mileage record are free for any UK registration. An Odomint Check adds outstanding finance, insurance write-offs, stolen markers and salvage history, with a £10,000 data guarantee.