If you study the owner's manual, you will also see the moment you should get the air filters changed. Regarding my car experts recommend to change my air filter every 2 years or when it is clogged. Actually, I hadn't changed the filtering system in four years because the device still looked pretty good, however I changed it anyway. But why every time I used to go to the oil change places they inform me I need a new air filter? Six months after I changed my air filter on my own, I took my car to one of these oil change places and the serviceman said my air filter would have to be changed. The air filter was slightly tarnished so they insisted it was beginning to clog. When I told them that I had just changed it months previous, they then told me it must be swapped out in another six months or so. I've since found an honest mechanic and I don't bring my cars elsewhere anymore. Another thing you should know could be that the workers of the oil change places don't need to go to school to tell you what you need to have done to your car. That's why you are better off finding a certified repair shop. . firestone oil change coupons I'm really sure you know that every car has certain recommendations about at what time certain services should be done. Things like oil changes, air filter changes and other routinely scheduled maintenance. Even so have you really checked out the owner's instructions for your car? I can practically guarantee whenever you examine the owners manual of your car you will notice that your oil doesn't have to be changed every 3, 000 miles like all those oil change places tell you. If you review your manual, you'll notice that you probably should have the oil changed every 6000 to 7000 miles. So basically these oil change businesses are lying to you about that.