What is an oil catch tank?

Oil Catch Tank .com

What is an oil catch tank?

GMP FERRARI 250 TESTAROSSA ENGINE 4_900x380_scaled_cropp

An oil catch can is used in turbo applications or high-performance race applications where excessive blow-by (leakage past the piston rings) of air and fuel vapour occurs. This creates a positive pressure in the crankcase. Engine manufactures have placed a valve on the engine block which releases this pressure.

This valve is known as a PCV (Positive Crankcase Ventilation) valve. During engine operation, blow-by gases, as well as oil mist from the rotating components of the engine, pass through the PCV valve and are routed back into the intake for the engine to burn off. However, some of the oil mist and other products settle along the engine intake and over time form a “gunk.”

The oil catch can collects the oil mist and condenses the fuel vapours while allowing “cleaner” gases to be passed back into the intake. Typically the blow-by gasses are passed through a wire mesh, which give the vapour droplets something to adhere to. Since the oil catch cans condense the vapour portion of the gasses, they will need to be drained periodically of all the oil, fuel and other contaminants.



  1. Robert behan - June 6, 2014 9:02 PM


    I’m interested in your oil catch tank but have a question.
    I have a honda type R rally car with b16 engine.
    On my engine I have two pipes one from the PVC valve at the bottom of the block and the second pipe from the cam cover. I’m looking to put these two pipes into a oil catch can and just have a breather filter at the top of the oil catch to allow the escape of gasses. I don’t want a pipe going to the intake.
    Is it possible for your oil catch tank to do this?

    • Bob - July 11, 2014 12:57 AM


      I would recommend two oil catch tanks with separate breather filters. I have two fitted to my Honda Accord Type R and they work perfectly!




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