Yes, off road driving is terminal for the engine (pistons/rings/cylinder walls) unless the K&N is heavily oiled to
"close" the large air spaces that they have, to allow greater air flow, imiproved performance. 

Frequently changed good quality paper filters do a good job.

bob

On Jun 6, 2013, at 9:56 AM, Timmy Evens <monkey_lips@YAHOO.COM> wrote:

Quick question: why does poor air filtration result in higher levels of silicone in your oil? Where's this silicone coming from?

Tim

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