Quoted:
Quoted: K&N style filters: When you absolutely need to get an overpriced filter that doesn't filter very well...
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My AirRaid system on my F-150 saves me 2mpg. My throttle body is cleaner than any plate you have ever eaten off of after 60,000 miles.
I bet you use fram dont you
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Actually, my 00 Crown Vic has a 03 Marauder air intake which uses a German Mann paper filter.
I used to use a Accel Kool Blue and a K&N filter, but the cotton gauze let through so much sand and dirt that I just didn't use it anymore. I did not notice any increase in gas mileage. I drive through a dusty corn field after drag racing... One time I had my paper filter and went home to tap out half the Sahara desert. The next time I went racing, I used the K&N. I went home and tapped it out to find nothing other than a bug or two. Where did all the sand and grit go? In the engine.
I doubt your throttle body is super clean because your PCV is pumping in a steady stream of hot oil vapor. At 10k miles, your upper intake elbow and TB plate should be pitch black (downstream of the fresh air intake). Remove your air intake hose, open up the throttle and look at the back of the plate. It should be OILY and black.
My Vic's TB plate on the front is totally clean. Paper filters filter very well.
If cotton gauze + oil worked well as filters you'd see them on HMMWVs and other tactical trucks.