Despite its relatively small size and humble appearance, the oil filter plays a crucial role in maintaining the engine's health, longevity, and overall performance in all vehicles. This small paper filter is responsible for looking after the engine, protecting it from effects of contaminants and impurities that can accumulate within the oil.

The main job of a car oil filter is to remove contaminants from the engine oil before it circulates through the engine. As the engine runs, it can create a multitude of byproducts, including dirt, debris and metal particles, many of which are too small to see with the naked eye. If these impurities are allowed to circulate freely, they can cause corrosion and increased friction, which can significantly reduce the engine's efficiency and lifespan.

What Does The Filter Look Like?

Oil filters are typically shaped like a cylinder, with something inside to act as the filter. This filter medium is often made of a paper or synthetic material which allows it to capture contaminants while allowing clean oil to flow through. As the oil circulates through the filter, the filter medium traps particles of various sizes, preventing them from reaching critical engine components. If you are not sure which filter you need for your particular vehicle then CheckMOT can help. We carry a full range of oil filters and many other car parts, from all the top manufacturers on the market.

Replacing the Oil Filter and Oil

Regularly changing the oil filter is as important as changing the engine oil or keeping it topped up. Over time, the filter becomes clogged up with contaminants, reducing its ability to effectively filter the oil. Most vehicle manufacturers recommend changing the oil filter every time the engine oil is changed, typically between 3,000 to 7,500 miles, depending on driving conditions and the type of oil used. For many drivers, this means having the oil and filter changed as part of the routine annual service. If your mileage is much higher than average, then you might need to change the oil and filter more frequently, to keep the engine running at its best. If you notice that the exhaust fumes are dark, your engine oil looks very dark when you test it with the dipstick or a warning light comes on the dashboard, it could be time to change the engine oil as well as the filter.

Most drivers will book their vehicle into a local garage to get the oil and filter changed, but there’s no reason you can’t have a go at doing it yourself if you wish to. The most important part is getting the right oil and filter for the job. Not all filters will fit into every vehicle, and the type and size of engine will determine the grade of oil you need too. There are many online checkers where you can enter the vehicle’s registration number and the website will tell you what oil and size of filter you need, or you can check in your owner’s handbook.