Castrol ATF Dex III is a synthetic based product which was originally designed for use in pre 2005 automatic transmissions fitted to General Motors vehicles.  Due to it having a high viscosity index it is specified for many industrial and offshore applications where Dexron II or III or Mercon performance is required.  It should not be used where Dexron® VI, Mercon® V or Mercon® SP are required.

Approval Status

Meets Dexron III-IH, IID and II. Suitable as Power steering fluid.

Features and Benefits

Enhanced friction durability prolongs transmission life and promotes smooth shifting.

Technical Data

Name Method Units ATF Dex III
Relative Density at 15°C ASTM D4052 g/ml 0.861
Colour ASTM D1500   Red spectrum
Appearance Visual   Clear & Bright
Kinematic Viscosity at 100°C ASTM D445 mm²/s 7.9
Pour Point ASTM D97 °C -42.5
Brookfield Viscosity at -40°C ASTM D2983 mPa.s (cP) 17,600
Kinematic Viscosity at 40°C ASTM D445 mm²/s 32
Viscosity Index ASTM D2270 None 186

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

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