Castrol Magnatec 10W-40 is a semi synthetic ACEA A3/B4, API SN/CF engine oil which protects and cleanses your engine using Castrol Magnatec intelligent molecules which cling to the engine like a magnet providing an extra layer of protection. Castrol Magnatec’s unique formulation protects from the moment you turn the key, dramatically reducing* engine wear. Now with ultra-refined molecules, for protection you can see, hear and feel. Castrol Magnatec. Instant protection from the moment you turn the key.

Did you know?

Unlike your run-of-the-mill lubricants which run off the engine block once the vehicle is switched off, Castrol Magnatec remains firmly attached like a magnet so even during non-use periods and ignition procedures your car remains fully protected.

What vehicles is this product suitable for?

Castrol Magnatec 10W-40 is suitable for use in automotive petrol and diesel engines where the manufacturer recommends an ACEA A3/B4, A3/B3, API SN/CF or earlier specification 10W-40 lubricant.

To find the oil type and weight suggested for your vehicle; either check with your manufacturer, your local mechanic or head in-store and talk to one of our friendly team.


  • 4 Litre
  • 10W-40
  • ACEA A3/B4
  • Semi Synthetic
  • Intelligent molecules dramatically reduce engine wear at start up
  • Protects during all driving conditions, styles & temperatures

Castrol 10w-40 4L