What Is Included in an Oil and Filter Service?

An oil and filter service is the single most important routine maintenance task you can carry out on any vehicle. It is straightforward, relatively quick, and genuinely extends the working life of your engine — yet it is one of the most commonly neglected jobs on British roads. At MnF Motors in Edmonton N18, we have been carrying out oil and filter services for over 25 years, and not a week goes by without us seeing an engine that has suffered because this basic job was skipped or done incorrectly. This guide explains exactly what is involved, step by step, so you know precisely what you are paying for.

Why Does Engine Oil Need to Be Changed Regularly?

Engine oil does not simply lubricate your engine — it also cleans it, cools internal components, and prevents corrosion. Over time and mileage, the oil breaks down. It becomes contaminated with metal particles, combustion by-products, and moisture. Once degraded, it can no longer protect your engine properly. Continuing to run an engine on old oil causes unnecessary wear, reduced fuel efficiency, and — at its worst — catastrophic engine failure requiring a full Engine Rebuild, which is an infinitely more expensive outcome than a simple oil change.

The oil filter works alongside the oil, trapping particles and contaminants. Over time, the filter becomes clogged and can no longer do its job efficiently. Changing the oil without replacing the filter is a false economy — fresh oil will be circulating through a dirty filter almost immediately.

What Exactly Is Included in an Oil and Filter Service?

Here is a clear, honest breakdown of every step our mechanics carry out during a standard oil and filter service at MnF Motors:

1. Draining the Old Engine Oil

The vehicle is raised safely on a ramp. The sump plug — the drain point underneath the engine — is removed and all the old oil is drained completely into a collection container. This process ensures no degraded oil is left behind to contaminate the fresh oil. The sump plug washer is inspected and replaced if it shows any sign of wear or damage, ensuring a clean seal when the plug is refitted.

2. Removing and Replacing the Oil Filter

The old oil filter is removed and disposed of responsibly. A new filter — always the correct specification for your vehicle’s make and model — is fitted. On some modern vehicles, particularly German and European models, the oil filter is a cartridge type housed in a plastic housing rather than a spin-on canister. Either way, the principle is the same: the filter must be replaced every time the oil is changed.

3. Refilling with Fresh, Correct-Grade Engine Oil

This is where the quality of a garage really shows. At MnF Motors, we always use the oil grade specified in your vehicle’s manufacturer handbook. Using the wrong viscosity or specification can void manufacturer warranties and cause real engine damage. We fill the engine with the precise quantity stated for your vehicle, then check the level using the dipstick before confirming it is correct.

4. Checking and Topping Up Other Fluid Levels

As part of our oil and filter service, our mechanics always check your other essential fluid levels as a courtesy. This includes coolant/antifreeze, brake fluid, power steering fluid (where applicable), screenwash, and the clutch fluid reservoir. If any are low, we will advise you — and top them up where possible.

5. Visual Safety Inspection

With your vehicle safely on the ramp, our team carries out a brief visual inspection underneath. This includes checking for obvious oil or fluid leaks, inspecting the condition of visible brake components, assessing the exhaust system for damage or corrosion, and examining tyres for uneven wear or visible defects. This is not a substitute for a Full Car Service or an MOT Testing check — but it means we can flag anything obviously concerning before it becomes a serious or expensive problem.

6. Resetting the Oil Service Reminder Light

Most modern vehicles have a service interval indicator or oil life monitor. Once the oil and filter service is complete, this is reset so the system accurately tracks mileage until the next service is due. If a fault code has triggered a warning light unrelated to the oil change, our team can investigate further using professional Car Diagnostics equipment.

How Long Does an Oil and Filter Service Take?

In most cases, a standard oil and filter service takes between 30 and 45 minutes. Certain vehicles with more complex filter arrangements or restricted access may take a little longer. We always aim to return your vehicle to you as quickly as possible without cutting corners.

Is an Oil and Filter Service Enough, or Do I Need a Full Service?

That depends on when your vehicle last had a comprehensive check. An oil and filter service is a targeted job focused entirely on the engine’s lubrication system. A Full Car Service covers a much wider range of components — including air and pollen filters, spark plugs, brake pads and discs, suspension components, steering geometry, and more.

If your vehicle is due both, combining them in one visit saves time and ensures your car is roadworthy across the board. Our team will always advise you honestly on what your vehicle actually needs — never upsell work that is not necessary.