Loading…
4
Found out engine air filters are rated by how much dirt they hold, not by how clean the air gets
I was killing time in a shop waiting area in Tacoma last month and picked up a filter box that had a CFM number and a dust capacity number printed right on it. The counter guy noticed me staring and explained that a filter rated at 99% at 300 CFM can drop way down once it loads up with 200 grams of dust. I always assumed a filter either cleans the air or it does not, so this whole rating thing was news to me. He pulled two filters off the shelf and showed me one had more pleats per inch, which he claimed buys you thousands more miles before it chokes off airflow. I checked mine when I got home and the pleats were caked solid after about 18,000 miles, way past what the book suggests. Now I am wondering if I have been trading engine wear for a few extra bucks on every filter change. Has anyone here actually measured the difference in airflow with a gauge, or do you all just swap on mileage?
0 comments
Log in to join the discussion
Log In0 Comments
No comments yet
Be the first to share your thoughts on this discussion.