ExxonMobil Mobilgard 540 Cylinder Oil
Specifications
| OEM | ExxonMobil Marine | |
|---|---|---|
| Product type | Two-stroke marine diesel cylinder oil (slow-speed crosshead engines) | |
| Base Number (BN/TBN) | 40 mg KOH/g (ASTM D2896) | |
| SAE viscosity grade | SAE 50 | |
| Kinematic viscosity | 20 mm2/s at 100C; 216 mm2/s at 40C (VI 98) | |
| Flash point / Pour point | 248C (Cleveland Open Cup) / -21C | |
| Specific gravity | 0.919 g/ml at 15C | |
| Intended fuel / application | 0.50% sulphur IMO 2020-compliant fuels (VLSFO); suitable for ultra-low <0.10% S (ULSFO) operation per OEM guidance | |
| Engine-OEM approvals | Everllence (formerly MAN Energy Solutions) Category I for 2-stroke marine engines; WinGD Ltd. Liquid Fuel General Usage for 2-stroke marine engines; meets Japan Engine Corporation requirements |
Technical notes
Mobilgard 540 is a BN 40, SAE 50 cylinder lubricant for slow-speed, two-stroke crosshead marine diesel engines. The moderate 40 mg KOH/g base reserve is matched to the low acid load of IMO 2020-compliant 0.50% S VLSFO, neutralising combustion acids while limiting deposit and overbasing build-up; ExxonMobil also rates it for ULSFO (<0.10% S) and distillate operation per OEM guidance. The high-detergency formulation combats scuffing-related wear and offers strong thermal and oxidative stability. It carries Everllence (formerly MAN Energy Solutions) Category I and WinGD Liquid Fuel General Usage approvals for 2-stroke engines. Cylinder oil BN and feed rate must be matched to the actual fuel sulphur and engine load; selection and feed-rate strategy must be confirmed with the engine OEM and ExxonMobil before use.
Compliance
BN 40, SAE 50 two-stroke cylinder oil formulated for IMO 2020-compliant 0.50% sulphur (VLSFO) fuels, holding Everllence (MAN ES) Category I and WinGD general-usage approvals.
Compatibility
Other parts in this series
Related
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Frequently asked questions
- What fuel is Mobilgard 540 for?
- It is formulated for slow-speed two-stroke marine engines running on IMO 2020-compliant 0.50% sulphur VLSFO, and ExxonMobil also rates it for ultra-low sulphur (<0.10% S, ULSFO) and distillate operation per OEM guidance.
- What is its Base Number (BN)?
- Mobilgard 540 has a BN/TBN of 40 mg KOH/g measured by ASTM D2896.
- Which engine OEMs approve Mobilgard 540?
- It holds Everllence (formerly MAN Energy Solutions) Category I and WinGD Ltd. Liquid Fuel General Usage approvals for 2-stroke marine engines, and meets Japan Engine Corporation requirements.
ExxonMobil Mobilgard 540 Cylinder Oil
No public pricing — quoted per request