air filter

The air filter stops airborne contaminants from getting sucked into your car’s engine. It’s a paper filter that stops debris such as dust, leaves and wayward pelicans before they get inside the engine and do damage.

Most people are familiar with being told that they need to change their car’s air filter regularly, but many of these folks may be unaware of why this is important. Keeping the air filter clean keeps the engine clean and free of debris so that the engine can function optimally. A clean air filter also equates to better gas mileage, which means more money in one’s pocket. The amount of money laid out to purchase a new air filter is well worth it and pays for itself several times over in gas savings. To understand more specifically what an air filter does, one needs to know that the air filter is a crucial part of one of many automotive systems. Then, one can learn about the specific role of the air filter and how to maintain it properly for maximum benefits.

Automotive Systems

Like the human body, an automobile is comprised of many different systems that work together to make a car function. Examples of automotive systems include

  •     Braking
  •     Cooling
  •     Exhaust
  •     Transmission
  •     Suspension

The air filter is considered part of the fuel supply system. Fuel (either gasoline or diesel) is what a vehicle’s engine runs on, and getting the fuel from the tank to the engine is a complex process. The fuel system consists of the gas tank, carburetor or fuel injector, intake manifold, throttle body, as well as various pumps, filters (not just the air filter but also the fuel filter), gaskets, and other parts. The intake of air to the engine is mixed with the gasoline in a specific ratio to burn most efficiently.

The Air Filter’s Role

A good way to explain the function of an automotive intake air filter is to compare it to an allergy mask. People wear these masks over their nose and mouth so that when they inhale, pollen and other particles are unable to enter the respiratory system. Because of this, only clean air enters the nose, trachea, and lungs. The filtered air is far less likely to cause allergic reactions or asthma. Similarly, people wear dust masks when working in certain environments where dust, dirt, and other particulate matter is in the air.

Although the human respiratory tract has some ability to clean itself out (via sneezing, coughing, and other physiological processes), chronic exposure to heavy loads of foreign matter in the air can eventually cause an overload from which the respiratory system is unable to recover. In a car engine, there is no self-cleaning system whatsoever. Without an air filter, the fuel system would quickly become riddled with insects, leaves, and other debris, in addition to the same fine particles that can obstruct human lungs. The clogged system would be unable to function, and cleaning it out would be quite costly and messy, not to mention just plain inefficient.

Checking an Air Filter


The air filter is usually quite easy to access on most cars. The cover is held in place with snaps or clips, which are easily unfastened by hand. A few vehicles require a screwdriver to access the air filter compartment. One can consult the owner’s manual to determine the location of the air filter.

Once the cover has been removed, the air filter should be lifted out and held up to a bright light source, such as the sun or a light bulb. A completely opaque filter is a sign that the filter is full and can no longer effectively strain particulate from the airflow. An air filter that allows some light to shine through still has life left in it. Do not be over zealous with changing the air filter, as this costs money and is not good for the environment if disposable paper filters are used. No air filter looks completely clean and white if it has been doing its job.

Air Filter Maintenance

In order to achieve maximum performance and gas mileage from a vehicle, the air filter should be changed at least 3times a year. This suggested time interval varies depending on how many miles are driven yearly and the type of environment one typically drives and parks in. Cars that are driven on dusty dirt roads and in rural wooded areas need to have the filter changed more frequently. One should get in the habit of inspecting the air filter every few months to get an idea of how quickly it becomes dirty. It is common to at least check, if not replace, the air filter every time the oil is changed.



An oil filter is a filter designed to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. Oil filters are used in many different types of hydraulic machinery.

The importance of clean motor oil

Clean motor oil is important because if the oil were left unfiltered for a period of time, it could become saturated with tiny, hard particles that can wear surfaces in your engine. This dirty oil can wear the oil pump’s machined components and damage the bearing surfaces in the engine.

How oil filters work


Outside of the filter is a metal can with a sealing gasket that allows it to be tightly held against the engine’s mating surface. The base plate of the can holds the gasket and is perforated with holes around the area just inside the gasket. A central hole is threaded to mate with the oil filter assembly on the engine block. Inside the can is the filter material, most frequently made from synthetic fiber. The engine’s oil pump moves the oil directly to the filter, where it enters from the holes in the perimeter of the base plate. The dirty oil is passed (pushed under pressure) through the filter media and back through the central hole, where it re-enters the engine.

Choosing the right oil filter

Choosing the correct oil filter for your vehicle is of the utmost importance. Most oil filters look very similar, but small differences in the threads or gasket size can determine whether or not a particular filter will work on your vehicle. The best way to determine which oil filter you need is by consulting your owner’s manual or by referencing a parts catalog. Using the wrong filter can cause oil to leak out of the engine, or an ill-fitting filter could just fall off. Either of these situations could lead to serious engine damage.

You get what you pay for

Generally speaking, the more money you spend the better the filter is. Lower-cost oil filters can contain light-gauge metal, loose (or shredding) filter material, and poor quality gaskets that can lead to failure of the filter. Some filters may filter out smaller bits of dirt a little better, and some may last longer. So, you should research the features of each filter that fits your vehicle to determine which one best fits your needs.

Long-Lasting Performance Oil Filter

When used with KOYOROKI performance oil filter, offers the ultimate protection for your engine.



The cabin air filter helps trap pollen, bacteria, dust and exhaust gases that may find their way into a vehicle’s air conditioning and heating and ventilation systems. The filter also prevents leaves, bugs and other debris from entering the heating, ventilating and air-conditioning (HVAC) system


The cabin air filter, a feature found on most late-model vehicles, cleans the air that comes into the interior through the heating, ventilation and air conditioning system. It catches dust, pollen and other airborne material that can make riding in a car unpleasant, particularly if you have allergies or other respiratory problems.


Here are the basics: brake pads are used with disc brakes, while brake shoes fit with brake drums. Both styles serve the same function—pressing against a moving surface to slow and stop your car. Which type you will need depends on your specific car. Some have disc brakes in the front and drum brakes in the rear.


Brake Shoes vs. Brake Pads

If you take a look under your truck, you’ll either see a disc or drum brake setup and might wonder, “Which one is better”? The truth is there’s no simple answer, as your ideal brake choice will depend on how you’re using your truck. So, we put together a guide to brake pads and brake shoes so you can gain a better understanding of how each type can be right for your ride.

Brake Shoes


Brake shoes are at the heart of a drum brake system and are the “old school” approach to slowing cars and trucks down. Drum brakes have been in use since the creation of automobiles and can still be found on the rear axles of some trucks and small cars due to their simple design and incredible durability.

What are Brake Shoes?

  • Brake shoes are the friction elements of a drum brake system
  • They’re made out of steel that’s curved in shape and coated with friction material on one side
  • Unlike brake pads, brake shoes can be “re-manufactured” or recycled for future use

How Brake Shoes Work

  • During braking, a wheel cylinder in the drum brake system forces the brake shoes outward and against the spinning brake drums
  • This creates friction, slowing the drum and as a result, the vehicle

Why Brake Shoes are Still Used

  • Because drum brake systems have been around for so long, manufactures can build them cheaply. As a result, it’s not uncommon to find a replacement set of shoes for half the cost of a set of brake pads.
  • While drum brake systems don’t cool as efficiently as disc brake systems, they work great when used on the rear axles of vehicles. That’s because braking systems in general send most of their braking effort to the front axles. Simply put, your car’s rear brakes will most likely never get hotter than brake shoes can handle.

Brake Pads


Brake pads can be found in disc brake systems, which is the most commonly used braking design used in vehicles today. Every car, truck and SUV uses them on the front axles and some vehicles even use them on the rear axles, too. That’s because disc brakes provide better braking performance than drum brakes by staying cooler under extreme use.

What are Brake Pads?

  • Brake pads are the friction elements of a disc brake system
  • They’re made from a flat piece of steel with a thick friction media applied to one side
  • Unlike brake shoes, brake pads come in a wide variety of friction materials that are tailored to different driving styles

How Brake Pads Work

  • When you press the brake pedal, hydraulic pressure is applied to the backside of the brake pads, which forces them to tightly squeeze the spinning brake rotors
  • This generates friction, slowing the rotor and stopping your car

What are the benefits of brake pads?

  • Brake pads provide a distinct advantage over brake shoes in wet weather and have the tendency to direct water away from the friction surface Disc brake pads come in different pad formulations, so you can tailor your braking experience to your driving style and your vehicle
  • When it comes to performance, the clear winner is the brake pad, as part of the cooler-running disc brake system. But when you need an affordable way to stop your truck and don’t plan on tearing up the track, a set of brake shoes will do the job just fine and save you some dough over converting to discs.

Brake Rotor