[Carbon]

Have you tried one? Or what theory crafting do you offer?

Being active in the Genesis and other turbo clubs, catch cans are always one of the first mods on the list. With the general objective being; remove the blow by oil from the re-circulation into the intake manifold.

I've seen some IS guys running them. Anyone with insight into this on the IS-F engine? I'm not really into testing this on my beautiful engine

 

[2URGSE]

I had one of these (well, a device that a little more advanced that a regular catch can) on my WRX STi.

Not sure just how much blowby you'll get on the V8, especially when it's naturally aspirated, so I'm not certain you actually even need a catch can.