Marine Cylinder Oil specially designed to deliver outstanding dispersancy and detergency for the latest
model of Low Speed 2-stroke Marine Diesel Engines using very low sulphur residual fuel blends (VLSFO).
It meets the higher performance standards required of CAT II cylinder oils by MAN ES, particularly for
piston cleanliness and deposit control.
Product Description:
GP MARGEN MARINE 5040 (GS) has been developed to cope with sludge and deposit forming
tendencies of low sulphur fuels. These fuels have lower corrosion potential but may tend to form more
deposits. The cylinder oil is formulated to have enhanced detergency properties and excellent dispersancy,
wear and oxidation resistance properties. GP MARGEN MARINE 5040 (GS) is approved for the latest 2-
stroke low speed crosshead engines operating at higher BMEP and liner temperatures.


 Features & Benefits:
• Advanced detergency properties minimise deposits and the formation of sludges, protecting against piston
ring stick and ring groove deposits.
• Lower ash forming formulation, avoids crown land deposit formation, even when running very low
sulphur fuels.
• Excellent anti-wear properties similar to the characteristic low cylinder liner wear of the GP MARGEN
range of cylinder oils.
• Tested and compatible with all standard seal materials.
• High levels of ring pack cleanliness and anti-wear enables extended time between piston overhauls.
• Cylinder lubrication of the latest, highly rated low speed crosshead marine diesel engines operating on
blended residual fuels and distillates with sulphur < 0.5%.
• Recommended for cylinder lubrication of all MAN ES engines especially for the more severe
characteristics of de-rated engines.
• The feed rates as recommended by the manufacturer should be maintained and in accordance with engine
operating conditions. Higher feed rates may be required for running-in.
• To completely demonstrate its anti-wear performance, cermet coating is recommended on all piston rings.
• The guidelines of fuel cleanliness and compatibility of mixed fuels recommended by the manufacturer
should be strictly followed.


Sr. No Characteristics Test Method Results
01 SAE 50
02 TBN 40
03 Viscosity @ 100 0C, cSt D 445 20.5
04 Viscosity Index D 2270 105
05 Flash Point, 0C D 92 266
06 BN, mg KOH/g D 2896 40
07 Pour Point, 0C D 97 -33
08 Density @ 15 0C, kg/l D 4052 0.9153