When i had my intake off the bottom of the plenum was full of oil. When i was painting it i tipped it on its side and a ton of oil poured all over my pants.
I didnt expect it and i wondered how much oil was actually in it.
When the intake manifold is sitting upright like mounted on the car its that bulb at the bottom i think fills up with oil.
You might tip yours up on its side and let it sit in a pan or something and see if yours has collected oil as well.
Some one mentioned though it could help collect dust if any gets in?
It's not important to win, it's important to make the other guy lose.