Yes, Franko6 provided an excellent write-up about changing oil, sucking out the oil filter housing, etc. I do not disagree with anything he said or posted. I read his posts and observed the photos at the time they were coming-up. However, the oil filter housing doesn't really hold that much "left-over" oil to be concerned about compared to what's "left-over" throughout the engine. For those being anal about it, yes, to them it is an ocean of oil. If they only knew how much oil is "left-over" in the oil pan, hanging on the bottom of the Splash/Catch tray, in the galleys, on the crankshaft surface, engine block, on/in the head, inside the oil cooler, etc., they'd probably have a brain strain resulting in a stroke.
When I was installing the ALH TDI engine in my Vanagon, it hung there in the engine-bay with no oil pan on it for months .... like maybe 18-24 months. It hung there so long without an oil pan that it finally quit dripping oil. So, it is amazing how much "left-over" oil there is in an engine after you let it drain for only five minutes or even overnight. I've removed oil pans and was amazed at the amount of oil that was still inside after the drain plug had been out over-night.
Below is a pic of the Splash/Catch tray on an ALH engine. You can see the Dip Stick which was fully engaged. When the engine is running, the level drops considerably because the oil galleries are fully charged, there is oil up on top of the head at the Cam Shaft, everything is covered in oil, the piston oilers are spraying, and there is constantly a fog of oil in motion as well as draining back to the oil pan. And, keep in mind, the Crankshaft is above the Splash/Catch tray. ......... Oh, and that spinning oil pump chain is submerged in the oil ..
Take a look at the second, third, fourth, photos for more illustrations.
.......... So nothing to worry about with 5 quarts dumped in, assuming the oil filter was changed.
In the photo below, the engine is hanging in the Vanagon on a 50 degree angle.................................................... that's the tip of the dip stick
.....................................................................................................................................................................................................................v down there!
In the photo below, you can see that the oil pan has been cut for modification to use on the 50 degree angle. The relative location of the oil pump cog is what the marked circle is referencing.
Below, you can see the relationship of the Splash/Catch tray to the oil pan.