Originally Posted By: aquariuscsm
If your oil filter is mounted at the bottom of your engine (next to the oil pan) with the entry hole facing *up*,is there even a need for an ADBV?
Actually yes! Even though the filter would stay full without the ADBV, the oil passages directly above it would drain their oil down into the pan. I believe there used to be a thread on here with a diagram showing the details of that, hopefully someone here has that bookmarked!