I'm still experimenting -
Even after I installed pre & after filter screens in the valve covers (CCVs), I'm still getting a burst of oil making it's way to the intake at startup. When the valvetronics & throttle valve kick in - it settles down. Not sure what it's doing while driving. The gold thing in the middle of the clear tube is an old style brass fuel filter (Carquest # 86050). The oil didn't make it past it on startup.