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CRB Turbomax 15W-40 CH-4


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.

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Castrol CRB Turbomax 15W-40 CH-4 is an advanced heavy duty diesel engine oil. It is suitable for use in high speed 4- stroke diesel engines that use a broad range of fuel qualities.


New Castrol CRB Turbomax 15W-40 CH-4 contains specially engineered DuraShieldTM Boosters that help fight the main causes of engine damage. In severe testing, Castrol CRB Turbomax with DuraShieldTM boosters delivers up to twice the engine life*.

CRB Turbomax with DuraShieldTM boosters is proven in industry testing to help provide protection to your engine in two ways:

  1. Under severe engine operating conditions soot can agglomerate to form large particles which help to displace oil on moving metal surfaces. This results in metal to metal contact. CRB Turbomax with DuraShieldTM boosters helps to prevent the agglomeration of soot as well as protecting surfaces from wear.
  2. CRB Turbomax with DuraShieldTM boosters provides a protective layer on the moving metal surfaces which resists break down, even under difficult conditions.

* Based on time between camshaft rebuilds in a severe Cummins ISB engine test vs. an equivalent oil without DuraShield.

Typical Characteristics

Name Method Units CRB Turbomax 15W-40 CH-4
Density @ 15C ASTM D4052 g/ml 0.870
Viscosity, Kinematic 100C ASTM D445 mm2/s 14.3
Viscosity, CCS -20C (15W) ASTM D5293 mPa.s (cP) 4900
Viscosity, Kinematic 40C ASTM D445 mm2/s 106
Viscosity Index ASTM D2270 None 142
Ash, Sulphated ASTM D874 % wt 1.5
Total Base Number, TBN ASTM D2896 mg KOH/g 10.2
Pour Point ASTM D97 °C -45
Flash Point, PMCC ASTM D93 °C 200

Product Performance Claims



All packages should be stored under cover. Where outside storage is unavoidable drums should be laid horizontally to avoid the possible ingress of water and damage to drum markings. Products should not be stored above 60°C, exposed to hot sun or freezing conditions.

Additional information


18 L Pail, 209 L Drum