Castrol Cyltech 40 XDC Cylinder Oil
Specifications
| OEM / Manufacturer | Castrol Marine | |
|---|---|---|
| Product type | Two-stroke (crosshead) marine engine cylinder oil | |
| Base Number (BN) | 40 mg KOH/g (40 BN) | |
| SAE viscosity grade | SAE 50 | |
| Intended fuel / application | Marine fuels at or below 0.5% sulphur (VLSFO, ULSFO, MGO) plus LNG and methanol dual-fuel operation; not for HSFO with scrubbers (>0.5% S) | |
| Engine-OEM approvals | MAN Energy Solutions Category II No Objection Letter; approved across all MAN ES engine types, recommended for MAN B&W two-stroke engines Mark 9 and higher |
Technical notes
Cyltech 40 XDC (eXtra Deposit Control) is a 40 BN, SAE 50 cylinder oil holding a MAN Energy Solutions Category II No Objection Letter. The Category II passing criterion is that a 40 BN oil perform as good as or better than a Category II 100 BN reference oil; in MAN ES field testing on a MAN B&W two-stroke (Mark 9-and-above) engine running fuel below 0.5% sulphur, it was confirmed equivalent to a 100 BN reference with less crown-land deposit. It is formulated for marine fuels at or below 0.5% sulphur (VLSFO, ULSFO, MGO) and is a Category II lubricant for LNG and methanol, so one 40 BN oil covers clean-up and normal duty without alternating high- and low-BN oils. Confirm grade selection and feed rate with MAN ES and Castrol.
Compliance
Holds a MAN Energy Solutions Category II No Objection Letter as a 40 BN, SAE 50 cylinder oil for MAN B&W two-stroke engines Mark 9 and higher.
Compatibility
Other parts in this series
Related
●RFQ answered within ~4 h at major hubs routed to vetted suppliers no public pricing
Frequently asked questions
- What is the Base Number and viscosity grade of Castrol Cyltech 40 XDC?
- It is a 40 BN (40 mg KOH/g) oil with an SAE 50 viscosity grade, per the Castrol product literature and the MAN ES No Objection Letter.
- Which engines and fuels is Cyltech 40 XDC approved for?
- It holds a MAN Energy Solutions Category II No Objection Letter, is approved across all MAN ES engine types and recommended for MAN B&W two-stroke engines Mark 9 and higher, for marine fuels at or below 0.5% sulphur as well as LNG and methanol. Always confirm the correct grade and feed rate with MAN ES and Castrol.
- Do I need a separate high-BN oil for clean-up running?
- No. Castrol states one 40 BN oil covers all operations requiring a 40 BN cylinder oil; because it tested equal to or better than a Category II 100 BN reference oil, there is no need to alternate between high- and low-BN oils.
Castrol Cyltech 40 XDC Cylinder Oil
No public pricing — quoted per request