I don't know how many of you know this but your engine builds presure to your oil and when this builds to excess your engine has a hose that blows the air which also carries oil into your intake. Thats right your getting oil into your upper intake. My new intake will not allow any oil into the upper intake and redirect the pressure release to the back of the car.
Its not a large amount of oil that actualy make it out of this line but if you whant your car to last you may whant to plug the hole and run it to the rear