I'm seeing oil on my air filter. What would cause that?
It wouldn't be a K&N filter would it? I don't see how oil can get to the air filter otherwise. Unless there is a breather hose running to the air box, be the only other way, see where the hose runs to.
Check the PCV valve if bad replace new one if it's good pull the spark plug and look for them witch one has oil some time broken or bad piston ring will cause that..thank you and I hope this will help you
Go to this page. Copy & paste Url. http://www.powertraindirect.com/what-does-oil-in-the-air-filter-mean/
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