You might not think that a fraction of an inch here or there would affect your car's performance a whole lot, but when it comes to its alignment, the proper position of your wheels is very important. If your wheels are even slightly misaligned, you're paying more than necessary to operate your vehicle.
When your wheels are out of alignment, your tires are not rolling perfectly perpendicular to the road and/or parallel to each other. That causes the tires to wear unevenly and, often, prematurely, which reduces their service life. And when your tires are either "fighting each other" or not moving as efficiently as possible over the road, the increased rolling resistance leads to reduced fuel economy.
It typically takes a serious collision with a curb or pothole to throw your wheels out of alignment, but it can happen. Even if you don't notice any of the typical symptoms - uneven tire wear, the car pulling to one side, or other handling issues - we suggest having your alignment checked every 10,000 miles or about once per year. You should also have us check it whenever you buy new tires in order to maximize their tread life.