I have seen that before crash. That what o.s. does but they shoot it in the intake. Mesa the fuel line most of us have is real easy to sqweeze closed with our fingers. so when you have a long length of this hooked to the vent nipple it can colapse on the ext stroke or the power stroke. The breather not only pushes oil out but it also sucks air in every time the turns over twice. So with the hose i am talking about it has four ribs inside the hose that run the length of it which makes it almost imposible for it to colapse its self