Mobilgard M440
Mobilgard M440 is a high-performance 40 BN marine engine oil developed specifically for medium-speed trunk piston engines operating on heavy fuel oil (HFO). The formulation provides excellent oxidation stability, strong residual fuel compatibility and high load-carrying capability. It is recommended for deep-sea vessels, coastal ships and stationary power plant applications operating under severe conditions.
One of the key advantages of Mobilgard M440 is its excellent corrosion protection. The high alkalinity reserve helps neutralise acids generated from high sulphur fuels, reducing corrosion of rings, liners and bearings. This helps lower maintenance costs and extend engine component life.
Mobilgard M440 also provides strong engine cleanliness and wear protection. The formulation offers excellent detergency and dispersancy to keep camshafts, crankcases and piston undercrowns clean. Low volatility base stocks help reduce oil consumption while anti-wear additives protect heavily loaded components.
Another important benefit is its excellent residual fuel compatibility. The oil resists sludge formation, separates easily from water and maintains viscosity control during extended operation. High TBN retention helps combat deposits and corrosive wear while maintaining reliable lubrication performance.
Mobilgard M440 is recommended for medium-speed trunk piston engines used in marine propulsion and auxiliary engines, including deep-sea vessels, coastal and river ships, and stationary power generation. It is especially beneficial in engines operating with heavy fuel oil and low crankcase oil consumption.
Physical characteristics include SAE 40 viscosity grade with kinematic viscosity of approximately 14 mm²/s at 100°C. Mobilgard M440 has density of approximately 0.915, flash point of approximately 242°C and pour point of approximately −6°C. Total base number is approximately 40, providing strong acid neutralisation and corrosion protection.
