After looking again at the picture. On the first picture, there is oil in the front where it connects to the air box and the breather hose is down more. So if it is from the breather hose, why do I have oil before the breather hole and near the air box? If it is all from the breather hose, shouldn't all the oil be down more and none near the air box coupling?

 

This is pretty common. In some extreme cases, we've seen the oil build up so bad that it starts backing up into the MAS and causes some erratic readings. A quick clean-up gets everything back in check.

 

With an aftermarket intake I would think that the BOV venting in there would blow some oil back up to the filter. Hence why you hear the woosh more with an intake.
So does the catch tank rectify this problem? I have been noticing some oil on the floor, but it is alot lighter in color than engine oil. And my intake is just like yours.

 

Hi,

If your K&N we're really overoiled, it might drip down there. However, what you see is probably from the breather hose. The K&N oil starts out tinted red, so I don't think it would even look like the pics?

I have two DIY catch cans, one on the ventilation side and one on the breather side. The ventilation side catches a LOT more oil than the breather side.

My stock MAF pipe was also coated in oil when I installed my samco hoses. This is why I decided to install the catch cans, and from other posts and now personal experience, I'm glad I did the ventilation side as well.

Take care,

FB

 

Definitely blow by oil, no doubt. My WRX used to do that all the time, after a catch can installed, problem solved.

 

Its free lube for the hair drier!

 

If you do get a catch can, be sure it has a substrate inside of it to take the oil particles out of the blowby gas before it recirculates. I had a Greddy can (round one) and I came to find out that it was just an empty can. Needless to say it didn't catch much.

 

I heard just to put a brillo pad to catch the oil in the cans without waffers. Like the greddy and so on.


--Josh

 

A few months ago I put a couple Campbell-Hausfeld line traps in. I haven't had an opportunity to drive the car really hard since then so I've collected a barely visible smudge of oil in the glass. But, pretty quickly the frits turned yellow-brown while I can't see any discoloration on the clear tubing. So I agree that most of the oil is an aerosol and will pass through an empty can. There's a reason line traps have frits!

Dave