How often should a PCV filter be replaced?
How often should a PCV filter be replaced? On some engines, you'll find a mesh filter underneath the valve. Some car manufacturers recommend replacing the filter every 30,000 miles or so. Most PCV valves contain a spring-loaded device. Once you remove the valve, shake it with your hand. You'll hear a rattle. If you don't, it is time to replace the valve. Can a PCV valve affect your fuel economy? Infact, it could have a negative impact on your FE. PCV valves are super cheap, and I used to change them every other oil change back when I drove a...