Optigear Synthetic X 320

High performance synthetic gear oil

Premium synthetic oils for industrial gears operating at wide temperature fluctuations and high loads.

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  • OEM approved 45 approvals
  • Product category Gear Oils
  • Sub-category Synthetic enhanced
  • Application Low friction / high surface protection


Premium synthetic oils for industrial gears operating at wide temperature fluctuations and high loads. Also for sliding and rolling bearings, wind turbine gears, crane control gears. Delivers best-in-class surface protection and friction reduction for gears.
For use in heavily loaded industrial gears
High load-carrying capacity Superior micropitting protection Reduces friction between moving parts Good filterability Excellent suitability for bearing lubrication
Optigear Synthetic X series are based on synthetic hydrocarbons and a special additive package to minimise plastic deformation.The additive package, when activated by high specific loads and temperatures, helps to equalise surface roughness and minimise abrasion, thereby improving the surface profile of contacting gears.
Optigear Synthetic X series may be used in spur, bevel or planetary gear units and in heavy loaded gears, e.g. wind turbine main gears. It is also suitable for the lubrication of oil-lubricated rolling element bearings.


Operating temperature Min. -30°C

Max. 100°C
Viscosity 320 mm/s² at 40°C
Viscosity index 150
Oil type PAO
Product type Lubricating Oils
Applicable to these sectors Cement, Chemicals, Engineered Wood, Machinery, Metal Goods, Metals, Mining, Power Generation, Pulp & Paper, Wind

wind turbine carbon-offset calculator

It's more than just oil. It's liquid engineering.


Castrol Optigear is the world’s first carbon neutral gear oil for wind turbines, this calculator tool can show you how much CO2 you could offset by using one of our Castrol Optigear products.

Enter your fleet capacity in either number of wind turbines or total MW.

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By using Castrol Optigear
products, you’ll offset

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of CO2


That’s the same amount as

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in a woodland the size of

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did you know?

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