concours
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- Joined
- Dec 29, 2011
- Messages
- 9,439
I have seen fine dust pile up inside of pleated paper aircleaners as well (Honda Accord).
1.6 million miles on TDI's, pleated paper MANN filters, always surgically clean downstream of the filter. A quarter million on other cars, 300K on bikes.
Never noticed any dust on any vehicle except a few that were assembled wrong, creating a leak.