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I just found the following statistics on Volvo's own web page concerning their air filters:
"Precise cleaning capacity. Volvo's specially folded oil-impregnated filter paper has a cleaning efficiency rating of 95%. It enables the filter to allow small harmless particles to pass through, while trapping larger sharp particles that can accelerate engine wear. "
Here's the link: http://www.ownerconnection.com/Home/PageContent.asp?PageID=267&V={33103D6B-5221-8B84-F84F-408CEEFA2B71}&T=2&C=337,208,225,398,226
The K&N test data indicates an efficiency rating of 97%.
Any opinions?
-Ted
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