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Originally Posted by wols0003
I'm going to defend K&N a little bit here from the typical bashing they often recieve on forums. Why don't you put a secondary filter behind a paper filter or the OEM filter and look at the copious amount of dirt it collects. Dirt gets past any filter. If you don't believe me check out this link. http://www.bobistheoilguy.com/airfilter/airtest3.htm
Yes, K&N filters let in slightly more dirt than an OEM; I should say very, very slightly. It won't make any diference to the oil or the motor. Oil is designed to deal with a certain amount of dirt, and using a K&N filter is not going to bring the oil over the dirt-threshold point.
Just look at the secondary filter in the tests with a paper filter; it's filthy with dirt. Just think about all the dirt that is getting into your engine with your oem filter. Surely your engine can't survive with all that dirt grinding around in the engine can it? Tired of K&N bashing... |
Bob's reasearch is very simplistic and does not measure the particle content passing the filter, it is as he basically says just an eyeball check. It's like looking at two dirty oil filters and and saying one is dirtier then the other, thus one filter is better then other filter. That is rather laughable to say the least, and I'm glad the mfg's of our cars don't design our cars that way.
Forgot to add that the ISO testing of any OEM filter will almost 100% of the time be better then aftermarket products. The Mfg standards are higher in almost 100% of cases then the aftermarket products because aftermarket mfg's do not want to spend the extra $'s to have equal or more efficient filter made when all they have to do is say they are better knowing there is no law against their statements as has been proven in various cout cases. One case was Mobil suing Castroil for advertizing their oil to be synthetic, because in fact it is not. Mobil lost the case as the judge ruled that word synthetic was just a advertizing type of trademark and not a discription of an oil. In other words the judge did not believe there is such a thing as synthetic oil. Go figure.