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 51,43 € (10,29 € / l) View on Amazon MANN-FILTER HU 5001 z Ölfilter - für Pkw + Transporter 8,01 € View on Amazon