How to change your engine oil | Porsche 911

This 911S I bought a couple weeks ago.
She arrived home, tired and dusty. She had been standing still for years and some maintenance was required to improve her overall performance.
Renewing the oil was necessary, since I didn't knew when the last oil change was carried out and the oil had this dark grey/brownish colour.
Along with the oil, I renewed the oil filter and restored the oil holding tank.
Specs about the car:
Porsche 911 S
Flat-six 2.7ltr engine
Made in 1974
Oil used:
HDX Kroon oil 20W50
Jan