Are you guys still buying into that Youtube moron?
The Bottom of the reservoir IS the inlet to the HPOP. The reservoir is replaced with oil in the pan in seconds. During a highway run, you're "flushing" the reservoir every 3-4 seconds constantly.
Anyone that doesn't believe this has never pulled the reservoir off their truck and LOOKED in it.
I gave a visual demonstatation at the TS event to a bunch of guys that seemed elightened. If you want more information, you're free to call me. But trust a manufacturer of HPOPS and an expert in the HEUI system, there is no oil change to the HPO reservoir.
There IS howerever, a screen filter in the 2000-2003 reservoirs that you may scrape debris off of when sucking them out, but you may also damage that screen if your not carefull. But... pull the reservoir off and see just where you sucked oil from and you'll feel pretty silly for posting that you sucked that dirty oil out. You probably had your hose right into the inlet of the HPOP.
I have no interest in arguing this topic, and as Rush would say ..... "Do not doubt me"
My favorite quote I have told many guys so far over the phone is this " If you are anal enough to feel the need to pull the 1/2 quart or so of oil out of the reservoir, you must loose sleep over the quart or two left in the rails!"
Bob