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.Castrol 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 Castrol Alphasyn T range have very low pour points and excellent viscosity and temperature characteristics, allowing their use in both low and high temperature applications. Castrol Alphasyn T range is fully compatible with nitrile, silicone and fluropolymer seal materials.