Gear Oils

Castrol Alphasyn T 150
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Synthetic Gear Oil


The Castrol Alphasyn T gear oil range of synthetic lubricants is based on polyalphaolefin (PAO) fluids and sulphur/phosphorus anti-wear additive technology providing outstanding thermal stability and good load carrying capacity


The Alphasyn T range has been formulated for use in most types of light to medium duty enclosed gear systems but should not be used for heavy or shock loaded systems. Alphasyn T is also suitable for bearings and circulatory systems operating at high temperatures. Alphasyn T is suitable for various applications where a lubricating oil is used under high temperatures, e.g. from hydraulic systems through to large, slow moving gears. All products in the Alphasyn T range have very low pour points and excellent viscosity and temperature characteristics, allowing their use in both low and high temperature applications.

The Alphasyn T range is fully compatible with nitrile, silicone and fluropolymer seal materials.

Alphasyn T is classified as follows:
DIN Classification is CL

The Alphasyn T range meets the requirements of:

  • DIN 51517 Part 2
  • David Brown Type A
  • Good thermal and oxidative stability provides reliable operation and extended operating life when compared to mineral oil based products.
  • Inherently high viscosity index (VI) makes the product suitable for operations operating over a wide temperature range.
  • Good anti-wear and load carrying abilities minimises gear wear and prolongs gear tooth life.
  • Reduced down time through water separation and demulsification characteristics resulting in prolonged lubricant life and increased equipment reliability.
  • PAO based lubricant that provides good compatibility with seals, paints and mineral oil based lubricants.
Operating temperature Max. 110°C
Viscosity 150 mm/s² at 40°C
Viscosity index 135
Oil type PAO
Product type Lubricating Oils
Applicable to these sectors Aerospace, Automotive Manufacture, Cement, Chemicals, Engineered Wood, Machinery, Metal Goods, Metals, Mining, Pulp & Paper, Sugar

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