I have never filled my car with oil to the full specs according to the manual. I usually only use about 3/4 of the approximately 5L jug. I go with what the dipstick says. You will not drain all the oil out of your engine, there will always be residual oil left in the oil lines, turbo, and all the oily film protecting your engine internals.
That's why people putting in 4.25 quarts are reading high on the dipstick.
The dipstick is a physical measurement, which imo is the most reliable. The spec# in the manual is from a bone dry engine.
2017 w/Recaros - bone stock