Up to 75% of engine wear happens while your engine warms up. When the engine stops oils drain off critical engine parts, however Castrol Magnatec’s intelligent molecules don’t, they cling to the engine like a magnet providing an extra layer of protection ready to protect from the moment you turn the key.


Castrol Magnatec 5W-40 C3 is suitable for use in automotive gasoline and diesel engines where the manufacturer recommends an ACEA C3

API SN/CF or earlier specification 5W-40 lubricant.

Castrol Magnatec 5W-40 C3 is approved for use in a vehicles from a wide range of manufacturers, please refer to the specifications section and your vehicle handbook.

Castrol Magnatec 5W-40 C3 has been specially formulated to deliver outstanding protection for the latest engines fitted with after treatment devices such as diesel particulate filters and 3 way catalysts

Castrol Magnatec 5W-40 C3 is approved to *GM dexos2®: supersedes GM-LL-B-025 and GM-LL-A-025 License number (GB2D0115082).

Typical Characteristics

Name Method Units Castrol Magnatec 5W-40 C3
Density @ 15°C, Relative ASTM D4052 g/ml 0.85
Viscosity, Kinematic 100°C ASTM D445 mm²/s 13.4
Viscosity, CCS -30°C (5W) ASTM D5293 mPa.s (cP) 6220
Viscosity, Kinematic 40°C ASTM D445 mm²/s 81
Viscosity Index ASTM D2270 None 169
Pour Point ASTM D97 °C -45
Flash Point, PMCC ASTM D93 °C 207
Ash, Sulphated ASTM D874 % wt 0.8

removal of A/B specifications as per ACEA 2010 and add dexos information

Get it now