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If you read about direct injected engines & turbos you learn pretty quick about pressures in the engine, intakes and how oil deposits will accumulated on the air inlets & on the back side of intake valves. The downside of direct-injection is fuel isn't cleaning this area.

The conventional wisdom has been to install an oil catch can on the air that's being recycled to remove contaminates. Honda neglected to include this component - I personally believe because a typical Honda owner wouldn't deal with dumping it.

My question is: has anyone out there installed a catch can on their CRV? How much does it catch, over how long? Did you install it yourself? Can you show a photo of which hoses you connected to it?
 

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I think a few people over on CivicX have installed them; they ain't catchin' much. The PCV system on our cars seems to do a pretty decent job with oil separation. (It's not just a simple one-way valve bolted to the block; it's some fancy thing that inserts into the valve cover and lets the vapor wind through some tubing before going back into the intake.)
 

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.......and in the Honda DI 1.5L cartoon, the backsides of the intake valves do get sprayed.
 
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