Slow-speed engines
Our range of marine cylinder lubricants, Castrol Cyltech, prevents deposits and corrosion in your slow-speed engines.
Slow-speed engines
Engines face lubrication challenges due to varying fuel sulphur levels, feed rate optimization requirements and operational conditions. Our range of two-stroke marine engine lubricants, Castrol Cyltech, provides optimal protection against corrosive and mechanical cylinder wear. We’ve formulated every product in this range with special care to ensure you get the right balance of base number (BN) and detergency to protect your engines.
Castrol Cyltech range
- Provides the right formulation of BN and detergency to lubricate engines operating on gas or liquid fuels with varying sulphur contents
- Enables simplified vessel operations when operating on a wide range of fuels including LNG and methanol
- Available in over 800 ports around the world
Castrol Cyltech 40 XDC
- Category II 40 BN cylinder oil*
- Formulated for increased cleanliness in combustion cylinder
- Performance equal to or better than a category II 100 BN cylinder oil
- Approved across all MAN ES engines and recommended for Mark 9 and higher
- Category II lubricant for LNG and methanol**
No objection letters
- MAN ES category II
- Win GD
Marine fuels <0.5% sulphur
- MGO: marine gas oil, <0.1% sulphur (distillate)
- ULSFO: ultra low sulphur fuel oil, <0.1% sulphur (residual)
- VLSFO: very low sulphur fuel oil, <0.5% sulphur (residual)
Castrol Cyltech 40SX
- Bespoke detergency system for engine cleanliness
- Very good overall performance, especially deposit control
- Excellent performance at optimised feed rates
- Approved for use in Win GD DF dual fuel engines running on LNG
- Proven performance on biofuels (B30 and B50)***
No objection letters
- MAN ES category I
- Win GD DF
- JEC
Marine fuels <0.5% sulphur
- MGO: marine gas oil, <0.1% sulphur (distillate)
- ULSFO: ultra low sulphur fuel oil, <0.1% sulphur (residual)
- VLSFO: very low sulphur fuel oil, <0.5% sulphur (residual)
Castrol Cyltech 70
- Good performance at high temperatures
- Lubrication of low speed crosshead engines
- Suitable for use with compliant fuel and HSFO, subject to OEM recommendations and technical advice
No objection letters
- MAN ES category I
- Win GD
- JEC
Marine fuels <0.5% sulphur
- MGO: marine gas oil, <0.1% sulphur (distillate)
- ULSFO: ultra low sulphur fuel oil, <0.1% sulphur (residual)
- VLSFO: very low sulphur fuel oil, <0.5% sulphur (residual)
HSFO with scrubbers >0.5% sulphur
- HSFO: high sulphur fuel oil
Castrol Cyltech 100
- Protection against corrosive wear
- Excellent control of piston ring and cylinder liner wear
- Helps extend periods between unit overhauls
- Granted category II status – latest performance category from MAN ES
No objection letters
- MAN ES category II
- Win GD
- JEC
HSFO with scrubbers >0.5% sulphur
- HSFO: high sulphur fuel oil
Castrol Cyltech 140
- Improved protection of cylinder liners in engines operating under corrosive conditions with lower feed rates compared to 100 BN oils
- Protection against corrosive wear
- Excellent control of piston ring and cylinder liner wear
- Granted category II status – latest performance category from MAN ES
No objection letters
- MAN ES category II
HSFO with scrubbers >0.5% sulphur
- HSFO: high sulphur fuel oil
* MAN Energy Solutions (MAN ES) no objection letter for category II cylinder oil Cyltech 40 XDC, 40BN, SAE 50 from Castrol.
** Tests were performed as per the MAN ES category II approval process and Castrol Cyltech 40 XDC was recommended for use with MAN B&W two-stroke engines Mark 9 and higher. Different engine types and different engine operation conditions may require different cylinder lubrication feed rates and or oil type.
*** Based on no harms vessel trials carried out by bp on B30 and B50 biofuel blends with residual fuel (VLSFO) lubricated by Castrol Cyltech 40SX.
Combine the right product with an active monitoring programme
No two vessels are the same, which means you can’t afford to make assumptions about BN levels across all cylinder lubricants. Castrol Technical Services can help ensure you are using the appropriate lubricant, along with the right feed rate, and monitoring approach to maximize long-term performance. We’ve got an unbeatable depth of engineering knowledge and skills to work with you on a one-to-one basis. Our SmartGains methodology is designed to maximize the operation and productivity of your asset, prevent unnecessary costs and delays, and optimize the ordering process. And with LabCheck it’s easy for you to get the right data at the right time, identify every potential saving, and minimize unplanned downtime.