Silkolene Castorene R40S Castor Based, Synthetic Enhanced, Racing Oil - 1 Litre

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Silkolene Castorene R40S - Unleash Your Engine's Performance.

Unlock the full potential of your engine with Silkolene Castorene R40S. This high-performance racing engine oil is specially formulated to deliver exceptional protection and performance for motorcycles. Whether you're a professional racer or a passionate enthusiast, the Castorene R40S is designed to enhance engine performance, reduce friction, and prolong engine life. Experience the power and reliability that Silkolene is renowned for with Castorene R40S.

Key Features:

  • Ultimate Engine Protection: Silkolene Castorene R40S is engineered with advanced additives and synthetic base oils to provide superior engine protection under extreme racing conditions. It offers excellent resistance to thermal breakdown, minimizing wear and ensuring optimal engine performance.

  • Reduced Friction: The low viscosity formula of Castorene R40S reduces internal friction, enhancing power output and fuel efficiency. This results in improved acceleration and overall engine responsiveness, giving you a competitive edge on the track or road.

  • Excellent Thermal Stability: The high-quality synthetic base oils in Castorene R40S provide excellent thermal stability, preventing oil degradation and maintaining consistent lubrication even at high temperatures. This helps to extend oil life and protect critical engine components.

  • Enhanced Engine Cleanliness: Castorene R40S is designed to keep your engine clean and free from harmful deposits. It resists sludge formation and keeps internal engine parts, such as pistons, rings, and valves, clean and functioning optimally.

  • Versatile Performance: Suitable for both two-stroke and four-stroke engines, Castorene R40S is a versatile engine oil that can be used in a variety of motorcycles, including high-performance racing bikes. It meets the highest industry standards and is trusted by professional riders worldwide.

  • Trusted Brand: Silkolene has a rich heritage in the motorcycle racing industry, providing high-quality lubricants for over a century. Castorene R40S is backed by Silkolene's expertise and commitment to delivering superior performance and reliability.


  • Brand: Silkolene
  • Product: Castorene R40S
  • Type: Synthetic Racing Engine Oil
  • Size: Available in 1 Litre Bottle
  • Compatibility: Suitable for both two-stroke and four-stroke engines*

Unleash the full potential of your engine with Silkolene Castorene R40S. Upgrade your lubrication system and experience the performance, protection, and reliability that Silkolene is known for. Give your engine the care it deserves and maximize your riding experience.

Package Includes:

  • 1 x Silkolene Castorene R40S Racing Engine Oil (size of your choice)

Choose Silkolene Castorene R40S for uncompromising engine performance and protection. Elevate your riding experience and take your motorcycle to new heights with the ultimate racing engine oil. Trust Silkolene to keep your engine running at its best.

More Information
Engine Oil
Volume - Size
The Silkolene range of motorcycle lubricants is one of the largest available. This means that there is a product to suit you, whatever type of bike you have and whatever you use it for. Silkolene lubricants are constantly developed with race teams at the highest level of competition to ensure that they can deal with the greatest levels of stress that a motorcycle will ever endure.
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