Medium-speed trunk-piston diesel engine oil
Shell Argina S4X 40 is a multifunctional crankcase lubricant for highly rated medium-speed diesel engines
operating on residual fuel. Shell Argina S4X 40 is designed for conditions of very high oil stress and has been
further optimised to improve deposit control.
High detergency leading to exceptionally clean crankcase,
valve deck and pistons. The formulation has been further
optimised to reduce deposits in critical areas, e.g. piston
undercrown.
Very high oxidation resistance
·Longer oil life and greater resistance to oxidative
thickening.
Extra high Base Number (50)
·Longer oil life in engines where life is limited by depletion of
Base Number (BN). In many cases a satisfactory
equilibrium BN level can be maintained, in conditions where
this would be impossible with a 40BN oil.
Very good Base Number retention
·Resists secondary loss of Base Number due to oxidation.
Suitability for centrifugal separators
·High detergency/low dispersancy formulation releases
contaminants and water readily in centrifugal separators.
Full compatibility with Argina family
·Full compatibility with Argina family. Argina S4X 40 can be
used to top up engines already running on any other
member of the Argina family, giving immediate control of
BN without the need for an oil change.
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