^^ agreed...I just changed my Koup's oil yesterday and let it drain while I ate dinner. It took 5 quarts to fill it. This is the first time I let it drain for a long period -- usually I have some oil left in a 5-quart bottle. I also fill the filter with oil before installing it on the engine (out of the 5 quart bottle).
I always do mine similar to ForteSX. I usually start before lunch. I pull the plug and let it drain for a few minutes. Then I replug and go inside to eat lunch. When I come back and unplug, a surprising amout of additional oil comes out. By then the oil filter has cooled down a little also. I prefill the new filter since it goes in vertically.
I've only done one change so far, but I put in the whole five quarts of oil. It shows up to the full mark on the dipstick.