Any part of the car that takes in fluids or air from the environment should have a way of separating the good from the bad, of taking in only what benefits the mechanism and leaving the rest behind. This is why cars have air filters and fuel filters. True, they require regular looking after but this is one of the simplest and least expensive — and most important — maintenance procedures you can perform for your car. Changing your car’s filters on a regular basis can have a significant impact on engine life and performance.

If nothing else, learn how to change your own air filter. It’s quick and easy and saves you money.

The air filter is typically enclosed in a black plastic casing near the center-top of the engine (sometimes, however, it will be off to the side). It should be the largest non-metal assembly you see, about the size of a breadbox. When you get back home install the new air filter. Seal it up and you’re done.