Those hoses you guys are posting that your pouring that stuff into is not the PCV hose...you do realize that right? IMO you shouldnt put it into the PCV (unless its not liquid) because if its heavy enough it will run back into the filter. But if it doesnt, it would clean the TB. I just put a oil seperator inline on my PCV hose, so it may be a little tougher for me LOL. Hasnt cought any oil though, it will once I start romping on it again though LOL.