How long does an oil and filter change take?

When it comes to car maintenance for petrol and diesel car drivers, having a regular oil and filter change is essential. But how long does it take?

The frequency of an oil and filter change can vary due to a variety of factors, which includes your annual mileage and the servicing requirements of your car.

You should never skip an oil and filter change, the risks of not doing it can result in engine damage or - in worst case scenarios - complete engine failure.

In this guide, we explain how long an oil and filter change takes, and what you can expect to pay.

How long does an an oil and filter change take?

An oil and filter change takes between 20 to 40 minutes.

This includes the time it takes to drain the old oil, replacing the filter, add fresh oil, and carry out basic checks on the engine and the surrounding area.

At busy garages, the wait may be longer because of scheduling and additional inspections.

In these cases, you can speak to a mobile mechanic who can come to your home or place of work to carry out the work.

Modern cars with under‑trays or more complex layouts can also take slightly more time, as there are more steps and checks to be made.

What is an oil and filter change?

An oil change is a routine service that removes old, degraded engine oil and replaces it with fresh oil to keep the engine running smoothly – as well as to protect other key components.

Over time, oil breaks down, becomes contaminated, and loses its ability to lubricate moving parts.

Changing it prevents excess wear, overheating, and long‑term engine damage.

A filter change involves replacing the oil filter, which traps dirt and debris circulating in the engine.

A fresh filter ensures clean oil flows freely, improving lubrication and protecting engine components from premature wear.

• How to check your car’s engine oil
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How much does an oil and filter change cost?

The average cost of an oil and filter change with RAC Mobile Mechanics is £192.

An oil change can be carried out right on your driveway, meaning your car gets serviced without you even stepping outside.

We use high‑grade oils and filters that meet full OEM requirements, ensuring everything matches your manufacturer’s specifications.

This keeps your engine running efficiently and helps prevent long‑term wear or damage. The service is straightforward and transparent, with no unexpected charges.

^{Source: RAC Mobile Mechanics, average price quoted from 01/01/25 to 31/03/25.}

Can you mix engine oils?

Mixing engine oils is not recommended – and should only ever be done as a last resort.

Different oils, whether synthetic, semi‑synthetic, or mineral, are each designed with specific additives and performance characteristics that are suited to certain engines.

Combining them won’t usually damage the engine immediately, but it can dilute the benefits of the higher‑quality oil and reduce overall protection.

Mixing different viscosities can also affect how well the oil flows at different temperatures.

If you need to top up in an emergency, mixing is acceptable, but the engine should be drained and refilled with the correct oil as soon as practical.

Check out RAC Shops’ range of car oils and lubricants.

Risks of using the wrong engine oil

If the wrong engine oil has been added to the engine, then do not panic, but address the issues as soon as possible.

Although it may not be an immediate danger to the engine, the wrong variant can lead to engine damage – and in severe cases, engine failure.

If you have put the wrong engine oil in your vehicle, then visit your trusted local garage or call a mobile mechanic.