Oil and Air Filters

Though they’re small, your vehicle’s oil and air filters helps to keep things purring under the hood. Learn more about oil and air filters in this buying guide.

Filters 101

Oil and air filters are small-but-mighty parts of your vehicle. They help to keep air and oil clean as it circulates through your engine, which is a key in keeping your engine running smoothly. Both types of filters catch contaminants that could cause damage to your engine, and in doing so, they help your vehicle to run efficiently. 

Types of Filters


Oil Filters

It might not look like much, but your vehicle’s oil filter plays a big role in what’s happening under the hood. Oil filters help to remove any contaminants from the oil running through your vehicle’s engine, which helps to keep everything running smooth. It’s important to find the right oil filter for your car; a filter that’s the wrong size or shape for your car can leak, or worse, the filter could fall off completely.
Mechanical Oil Filters
Mechanical air filters are made from a pleated material to trap debris. They clog over time, so this type of filter should be cleaned often.
Magnetic Oil Filters
Magnetic oil filters use small electromagnets to attract and trap contaminants. Magnetic oil filters don’t need to be cleaned and don’t trap as much dirt as the other types.
Centrifugal Oil Filters
Centrifugal oil filters spin fast enough to create a centrifugal force, which traps any contaminants in the oil. This type of filter has two parts: a fibre material that acts as a filter, and a housing chamber that spins.
If you’re unsure about what size of oil filter to use, check your owner’s manual for details about what type is best for your car’s make, model and year.
Helpful tip: premium oil filters remove smaller particles and might last a little longer, but even the least expensive filter will ultimately protect your engine.

Air Filters

Much like the oil filter, your car’s air filter keeps dirt and debris out of your engine while circulating fresh, cold air throughout. The more air circulates through your engine, the more powerfully it can run. If your car has an air intake service indicator, keep an eye on it so you know when it needs to be changed. If you don’t have an indicator, you should check the filter every three months or so, and aim to change it about once a year.
Paper Air Filters
Paper air filters are a popular choice, and are generally the least inexpensive type of air filter. They’re efficient, however they need to be replaced every few thousand kilometres.
Gauze Air Filters
Gauze filters are made to last the life of your vehicle, but they need to be cleaned often. There are two types of gauze air filters: dry and oil based. Oil-based gauze filters tend to filter better than dry, but they need to be oiled often.
Foam Air Filters
Similar to gauze filters, a foam filter should last the life of your vehicle, providing you clean it regularly and according to the manufacturer’s instructions. Foam filters also need to be oiled regularly.

When you should change your filters:

Air Filters
Check the recommendation in your owner’s manual. The rule of thumb is to check the filter every three months
Oil filters
As a rule of thumb, change your oil filter every time you change your oil, or four times a year

Shop Related Products:

This article is intended as general information. Always be sure to read and follow the label(s)/instruction(s) that accompany your product(s). Walmart will not be responsible for any injury or damage caused by this activity.



Store details