With car FULLY hot and driven, I pull in, immediately drain oil from pan.
When 95% or so has drained out, I start the car for 15-30 seconds...
(Still with me?)
This empties the pump and filter as well as the cooler of most of the oil in the respective volumes...
(Swooning yet?)
Then I remove the filter and oil cooler plug, and let drain for at LEAST an hour, sometimes all afternoon...
(I know, you don't have to say it, I've had plenty of other people tell me their thoughts on my process...)
; )