Hey Wills,
Sorry to hijack the post for a minute, I know that posts addressed at leerangerover, but what do you think would happen if I plugged or constricted the rocker vent, I'm losing over a litre of fully synthetic per 1000 miles and I'm sure my intercooler must be clogged with expensive oil at this stage. I found the problem when I went cleaning the AFM which had oil in it. I haven't taken off the cam cover to see what is going on as I don't have a replacement cover seal.