1st of all it has to be somewhat restrictive in nature because of the size hose. 2nd, I think it was Peter who filled it in 2 days. If it gets full then the oil goes right back into the intake. Finally, there is no way that that filter element is as efficient as the large cell foam piece in the Stef's and I'm sure the Moroso.
Got it..now I gotta "sell" it to the wife...