I think some people are taking the term "clogged" too literally. There's a difference between having a sandbox in your airbox and going an extra 10k miles between air filter changes (I'm sure many quick lube shops would love for you to replace it with every oil change). The biggest take away for me is that freer flowing filters like K&N are very unlikely to increase your mileage, so you might as well stick with the OEM filter.
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