It’s time to talk about your engine air filter. Your engine really needs clean air to operate efficiently: it takes about twelve thousand gallons of air to burn a gallon of gas in your engine. And clean air is much better than dirty.
When your air filter’s dirty, it simply can’t trap any more dirt, so the dirt just passes through into your air intake system. From there it can get into the engine combustion chamber. And burning dust and pollen in your engine does you no good.
The verdict: When your engine air filter needs to be replaced; it needs to be replaced. How often depends entirely on how dirty the air is where you drive. A simple visual inspection will tell you when you need a new engine air filter.
When you look at the air filter on your furnace at home and see it’s all clogged up with dust and dirt, you don’t hesitate to replace it. But don’t wait until your air filter (furnace or automobile) is totally pugged – by that time you’ve been running inefficiently for a lot of miles.
When your service technician brings out your nasty engine air filter, you now know why you should go ahead and change it out.