Castrol Duratec L is a monograde gas engine lubricant that provides excellent thermal and oxidative stability to reduce combustion chamber deposits and significantly reduce maintenance costs.

Approval Status

Castrol Duratec L is approved by:

  • Deutz
  • Jenbacher – engine types 2, 3 & 6 – Fuel Gas Classes A, B & C ( TI 1106-1109)
  • Jenbacher – engine type 4 – Fuel Gas Classes A & B ( TI 1106-1109)
  • Rolls-Royce Ulstein (applications with separate lubrication for turbochargers)
  • Wärtsilä 175SG, 220SG, 25SG, 28SG and 34SG
  • Wärtsilä 32DF and 50DF dual fuel engines running predominantly on natural gas

Castrol Duratec L meets the requirements of / is suitable for use in:

  • Perkins
  • Ruston
  • Caterpillar
  • Waukesha (normal coolant temperature installations)

Technical Data

Name Method Units Duratec L
SAE Viscosity     40
Base Oil Type     Mineral
Detergent Type     Calcium
Zinc Content ASTM D4927 ppm 320
Phosphorus Content ASTM D4927 ppm 280
Relative Density at 15°C ASTM D4052 g/ml 0.89
Kinematic Viscosity at 40°C ASTM D445 mm²/s 125
Kinematic Viscosity at 100°C ASTM D445 mm²/s 13.0
Viscosity Index ASTM D2270   97
Total Base Number ASTM D2896 mg KOH/g 4.5
Open Flash Point ASTM D92 °C 250
Pour Point ASTM D5985 °C -18
Sulphated Ash ASTM D874 % wt 0.45

The above figures are typical of those normal production tolerance and do not constitute a specification.

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