I don't know how effective it is. If you do it, you need to make sure the oil catch can will breathe. My catch can, while it caught much crap, did not have a breather and seemed to be causing too much pressure in the crankcase, too much pressure from the pcv valve and forcing more oil into the main intake just past the MAF. Perhaps two catch cans would be better, both very high flow or with breather filters, one for the pcv to sc and one from the crankcase metal tube to the main air intake just post maf. I removed my oil catch can for the time being.