In this tutorial I will show you how to change the engine oil including the oil filter on a Ford Focus MK4. Castrol MAGNATEC 0W-20 D Motoröl, 5L 44,51 € (8,90 € / l) View on Amazon MANN-FILTER HU 5001 z Ölfilter - für Pkw + Transporter 7,77 € View on Amazon