Castrol Alphasyn T 320


Castrol Alphasyn T 320 Is a 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.

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