ARGINA S3 40

Shell Argina S3 40 is a multifunctional crankcase lubricant designed for highly rated medium-speed diesel engines operating on residual, blended, or distillate fuels. With a base number (BN) of 30, it is formulated to perform under moderate oil stress conditions.

Key Features and Benefits:

  • Extended Oil Life: Optimized to resist oxidation and maintain BN, reducing the frequency of oil sweetening and extending oil life.
  • Engine Protection: Features an optimized level of detergency, ensuring exceptionally clean crankcases, valve decks, and pistons. The formulation is further optimized to minimize deposits in critical areas, such as the piston undercrown.
  • System Efficiency: Designed with a high detergency/low dispersancy formulation to effectively release contaminants and water in centrifugal separators. It can be used to top up engines already running on any other member of the Argina family, providing immediate control of BN without the need for an oil change.

Main Applications:

  • Medium-speed industrial or marine propulsion and auxiliary engines burning residual fuel oils, typically under the following conditions:
    • Engine designs less than 10 years old.
    • Oil consumption greater than 1 g/kWh.
    • Load factors below 85%.
    • Use of fuels with sulfur content less than 3%.
  • Marine engine reduction gears and certain other shipboard applications where specialist lubricants are not required.

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