Key Features and Benefits:

Extended Oil Life: Optimized to resist oxidation and maintain BN and viscosity, reducing the need for frequent oil sweetening.
Engine Protection: Offers superior detergency, ensuring exceptionally clean crankcases, valve decks, and pistons, particularly in critical areas like the piston undercrown.
System Efficiency: Features a high detergency/low dispersancy formulation that effectively releases contaminants and water in centrifugal separators.

Main Applications:

Medium-speed industrial or marine propulsion and auxiliary engines burning residual fuel oils, which create conditions of very high oil stress.
Engines with oil consumption less than 0.5 g/kWh.
Engines operating under load factors greater than 90%.
Engines using fuels with sulfur content greater than 3%.

Specifications, Approvals, and Recommendations:

Shell Argina S5 40 is approved by Wärtsilä and MAN Energy Solutions.

Due to its high base number of 55, this oil has a high ash content. To avoid excessive ash deposits, it should not be used with low-sulfur fuels or engines with high oil consumption. For these applications, other products in the Shell Argina family may be more suitable.