Dave, I pour new oil into my filters ahead of my oil changes. It takes some time to do it. I pour in some & come back to it after an hour and pour in more. The element absorbs the oil and finally I usually have to pour off the last bit as it will not absorb.
I feel at least I don't have a large volume for the pump to fill up upon start up after a change. I'm not sure that this actually does anything useful? I notice that it takes less time to get pressure up ( looking at the gauge ) when I do the first start up after changing the oil.
I know I'm not well!