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

Approval Status

Castrol Duratec M is approved by:

  • Perkins
  • Guascor
  • Jenbacher – Series 2 & 3 gas engines: Natural gas applications (TA1000-1106)

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

  • Waukesha (normal coolant temperature installations)

Technical Data

Name Method Units Duratec M
SAE Viscosity     40
Base Oil Type     Mineral
Relative Density at 15°C ASTM D4052 g/ml 0.89
Kinematic Viscosity at 40°C ASTM D445 mm²/s 124
Kinematic Viscosity at 100°C ASTM D445 mm²/s 13.0
Viscosity Index ASTM D2270   97
Total Base Number ASTM D2896 mg KOH/g 7.2
Open Flash Point ASTM D92 °C 250
Pour Point ASTM D97 °C -18
Sulphated Ash ASTM D874 % wt 0.75

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

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