Does Replacing Your Air Filter Improve Gas Mileage

November 5, 2013

Replacing the air filter in your car is not only necessary from time to time-it can actually improve your gas mileage. A smooth flow of fresh air is required by your engine to run efficiently. Air mixes with gasoline in the right proportions and creates the spark that propels the car. When you increase the size of your air intake, you can actually increase the car's performance. That is not the concern of most drivers, though. Fuel efficiency, on the other hand, is of paramount importance. A better MPG ratio means money saved at the gas pump.

How to Clean Your Car Air Filter >>

Air Filter Importance

When an air filter becomes overly clogged and blackened by use, it reduces the amount of air that flows into the engine, making the engine work harder and use more gasoline than it needs to in order to run efficiently. Replacing the air filter, then, returns the air flow to normal levels and in turn increases gasoline. Perhaps it's most appropriate to say that a clean, replaced air filter gets the gas mileage the car is meant to have.


A high flow air filter, one that increases the amount of air getting into the system, should increase gas mileage. By increasing air, the amount of gas that is needed is reduced, thereby getting you more miles per gallon.

You should check your air filter frequently to see if it needs replacing. Doing so when it is appropriate will save you money because it will keep your gas mileage high. A dirty, clogged air filter will reduce your car's performance by making it work harder than it has to. So make sure you replace it when you need to and keep your car in good working order.

Car Air Filter Replacement Guide >>

Related Questions and Answers

Will Performance Air Intake Kits Increase Torque?

Performance air intake kits are designed to increase horsepower and torque, and therefore increase the fuel efficiency of your car or truck. They are proven to be much more effective than regular paper air filters. One such kit is a cold air intake kit. These help bring cooler air from the outside, which helps the engine get more oxygen, then increasing performance levels. This is just one type of performance air intake kit that is on the market for cars and trucks. Some tests have shown it gave up to 18 percent more horsepower and up to 40 pounds of extra torque using a cold air intake kit.

Where can I find an Oil Filter Cross Reference Guide?

The oil filter cross reference guide shows the types of filters that can be used on vehicles. It can be found online at several locations in chart format. It is a very useful chart, as it can help you to understand the type of oil filters that your car or truck can use. It is just one of the important and useful guides that vehicle owners need to know about. You can download the guide after you find the website it is on, and keep it in your car's glove box for further reference for the next time you buy an oil filter.

How often should I Replace an Engine Air Filter?

It is import to replace the engine air filter on a regular basis if you want your car or truck to stay in good working order. How you drive your car or truck can affect how often it should be changed, but normally most manufacturers suggest that you change the air filter about once every 10,000 to 12,500 miles. In some cases, it may not have to be changed until about twice that length of time, but that depends on things like the road conditions, how dusty the roads are you drive on, etc. Most of all it is very important that you check the filter on a regular basis.

Does Air Intake affect Gas Mileage?

Studies have shown that cold air intake gas mileage amounts are about 5 percent better than if you don't use one on your car. The cooler air is denser and usually gives the vehicle additional oxygen for your engine to burn. In turn, this can increase the horsepower and give you more fuel mileage for your money. Sometimes though, this 5 percent or so increase is not seen by the driver, because if you drive too fast or otherwise don't take care of your car, you won't benefit from it since it is a somewhat small amount. So, it's your choice whether or not to use one on your car or truck.