olddog,
Been changing my 10 quarts of
oil for years, including the 3-QT ACCUSUMP. The procedure I use is to warm the car, emptying the accumulator and refilling it a few times to get all the
oil warm including what's inside the accumulator.
Then I open the valve and drain everything, put in the new filter and ten new quarts of
oil.
Finally, fire it up, open the valve and let the accumulator refill. I don't have to rev it to build pressure with the new, cold oil. Note that the engine has just been running to warm the oil prior to the change, so there's still a residue of the old oil in all the bearings etc.
If you're concerned about "hydraulic-ing," where there's way too much oil in the pan for when the pistons go to the bottom of their strokes and break, it isn't going to happen. If it did happen, the starter couldn't turn the crankshaft.
No seals blow either.
Or maybe you have another problem in mind?
Anyhow, been doing this two to four times a year for 6-7 years and no problems.
It seems to take just seconds (maybe 15-30 seconds?) for the thing to fill.
Only problem I have so far is the price of the ten quarts of oil keeps doubling
Tom