Sorry, I'm just a seasoned lab-rat who likes his data squeaky clean. My apologies for lightly bashing the work here. It is rather intriguing how infrequent the PRV opens. I wonder how some of the newer lube systems would fair given the variable displacement pumps which only give the engine "what it needs" to improve efficiencies, MPG, and so on (?). At red-line, the VDP wouldn't necessarily run 1:1 off the crank RPM like the old-style mechanical pumps. Also have to remember most car/truck hydraulic circuits are equipped with a pressure regulating valve (PRV) to limit the system oil pressure. If the system pressure exceeds the PRV, the oil filter may not even see any additional oil or pressure -- it will bleed off through the PRV to the crankcase.
Originally Posted by ZeeOSix
It's more scientific than what anyone else has done and shared on this board. He mentioned his setup and instrumentation, which seemed pretty decent. It's good info IMO.
Originally Posted by DudeNiceRide
Why is this a sticky'd topic? Study is appreciated, but seems pretty unscientific from which to draw hard conclusions. They do make laboratory test standards and require calibrated gauges for this stuff for a reason.