If someone would come out with an unbiased test that would show air flow rates among filter brands , then for the harder test , particle removal or air cleaning ability we might stop seeing all these post(But I doubt it). I was at AutoZone today and saw a new shipment of K&N air filters. If you read the back of the K&N box they will claim that their filter is the best filter on the market in both air flow rates AND filtering ability. Go to the Amsoil website and guess what........ Amsoil claims their filter is the best of both worlds. The K&N box even showed the Amsoil filter as dead last in air flow rate. While I'm at it , should I use a pure synthetic oil or semi-synthetic........oh BTW what about that Slick 50 or that ProLong stuff ?
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