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I'm going to try just using my air compressor and blowing the dirt out of the paper one from the back side (clean side)..
as for leaving them in for 80K at a time.. is that 80K untouched or tapped out?
If left in, your emissions systems love that.. (sarcastic)
with restricted airflow your engine dumps more fuel in and you get less burnt
fuel which causes anything after the engine sensors, cat's, ect to clog or
fowl up not to mention more carbon buildup..
I try and replace my air filters every 3K miles because thats how I do things.
I'm pretty anal for maintenance..
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