Replace your air filters
1 of 2
Photo 1: Vacuum the filter box
Remove the air filter and vacuum out any dirt.
2 of 2
Photo 2: Check the air filter
Hold the filter in front of a shop light. If dirt blocks more
than 50 percent of the light, replace the filter.
Told that your engine air filter needs
replacing? It may be true. But testing
your filter is easy and replacing it is
a brainless task—so do it yourself.
Replace the filter based
on its actual condition rather than
the manufacturer's recommended
service intervals. Checking its condition
isn't rocket science. Just pull it
out and give it a look-see (photo 2).
If it fails the back-light test, replace
it. While the filter is out, vacuum out
the crud in the air cleaner box.
Video: When to Change an Air Filter
A dirty air filter can decrease your gas mileage by almost 10%. Rick Muscoplat, an automotive expert at The Family Handyman, will show you how to test and when to change an air filter and start getting better gas mileage.