ExxonMobil Mobilgard 540 X Cylinder Oil
Specifications
| OEM | ExxonMobil Marine | |
|---|---|---|
| Product type | Marine two-stroke crosshead cylinder oil | |
| Base Number (BN) | 40 mg KOH/g | |
| SAE viscosity grade | SAE 50 | |
| Kinematic viscosity @ 100°C | 20 mm²/s (cSt) | |
| Kinematic viscosity @ 40°C | 232 mm²/s (cSt) | |
| Intended fuel / application | Multi-fuel: residual fuel oil and distillate at 0.10% and 0.50% sulphur (ULSFO/VLSFO), plus continuous LNG / dual-fuel gas operation | |
| Engine-OEM approvals | Meets WinGD requirements for all three fuel types; first cylinder oil gas-validated (dual-fuel/LNG) by WinGD |
Technical notes
Mobilgard 540 X is a BN 40, SAE 50 cylinder oil for slow-speed two-stroke crosshead engines. The moderate BN 40 alkalinity is tuned for continuous low-sulphur operation — 0.10% (ULSFO) and 0.50% (VLSFO) sulphur residual and distillate fuels — and for dual-fuel/LNG gas running, where high-BN oils risk calcium deposit build-up. ExxonMobil positions it as a 'keep-clean' multi-fuel oil that combats deposit formation on newer engine designs while enabling feed-rate reduction versus prior formulations. It was the first cylinder oil gas-validated by WinGD, meeting WinGD requirements across all three fuel types. Launched June 2020. Fuel-to-BN matching is safety-critical: confirm the correct grade, BN and feed rate with the engine OEM and ExxonMobil before use.
Compliance
Formulated for IMO 2020 low-sulphur compliance (0.10% and 0.50% S fuels) and LNG/dual-fuel operation, meeting WinGD requirements for all three fuel types.
Compatibility
Other parts in this series
Related
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Frequently asked questions
- What is the BN of Mobilgard 540 X?
- Base Number 40 mg KOH/g (BN 40), per the ExxonMobil product data sheet.
- What fuels is Mobilgard 540 X for?
- It is a multi-fuel cylinder oil for marine crosshead engines running 0.10% (ULSFO) and 0.50% (VLSFO) sulphur residual or distillate fuels, as well as LNG / dual-fuel gas operation.
- Is Mobilgard 540 X approved by WinGD?
- Yes — it meets WinGD's requirements for all three fuel types and was the first cylinder oil gas-validated (dual-fuel/LNG) by WinGD.
- What SAE grade is it?
- SAE 50, with a kinematic viscosity of about 20 cSt at 100°C and 232 cSt at 40°C.
ExxonMobil Mobilgard 540 X Cylinder Oil
No public pricing — quoted per request