http://www.frantzoil.com/TOILETPAPER.html
"Now, the Frantz Oil Filter with it's toilet paper element design, filters up through the center at the bottom of the unit but now it delivers the oil down the entire 4" height of the TP roll exiting at the bottom and being recirculated again back to the engine. The oil does not penetrate sideways through the roll as if from inside the cardboard and out the last row of paper. It filters down the entire height of the roll as when it sits on your bathroom sink."
http://www.ebay.com/itm/Frantz-Toile...FXIEq5&vxp=mtr