Castrol Magnatec Stop Start Full Synthetic 5W 30 A5 Engine Oil 6L 3429084 (Pickup Only) FD2547 NGK Ignition Coil U5089 NGK Ignition Coil U5089 Faulty glow plugs Castrol Magnatec Stop Start 5W 30 A5 is a full synthetic engine oil suitable for use in automotive petrol and diesel engines where the manufacturer recommends an ACEA A5 B5 Castrol Magnatec Stop Start 5W 30 A5 contains intelligent molecules that: Cling to engine parts when the oil drains down during idle stop start operation Form a self healing layer to protect at each of the critical stages of stop start driving and beyond Are proven to reduce wear in stop start operation