Depending on how much you drive your car should be how often you change your air filter. Sources say you should change it when you go to get your oil changed cause they both last about the same time.
Check it at each oil change, and replace when dirty.
Your air filter should be changed each time you have a oil change or perhaps a tune up which should be every 6 months.
How often you should change your air filter depends on how much you use it. If your air conditioner is not blowing enough air. That is generally a good sign that it needs to be replaced. After you replace it, continue to check it regularly and replace it whenever you think it needs to be replaced
every 5 to 10 thousand miles
Oil in an air filter is commonly caused by a bad PCV filter. Check the filter, and replace as needed.
Replace every 30,000 miles.
It is hard to tell when you should replace the air filter. It is all based on where you drive the car and how much dust is constantly getting to the filter. A good preventative maintenance measure would be to replace the air filter every year or 15,000 miles.
When it is dirty.
When it is dirty.
$10-20 for filter + labor.
Under normal conditions I recommend you replace it every 30,000 miles. Dusty conditions more often.
when it is dirty