Trunk Piston Marine Engine oil

UNOMARINETPO 4030 is a new generation, trunk piston engine oil suitable for use in medium speed diesel engine used for marine propulsion and land based DG applications. It is carefully blended from highly refined base stocks and latest additives that impart detergent, dispersant, anti-oxidant and anti-wear properties and to cope with higher stress levels in diesel engine.


UNOMARINE TPO 4030is suitable for use in medium speed trunk piston diesel engines for marine propulsion and land based DG applications running on residualheavy fuels of varying sulphur content. UNOMARINE TPO 4030isalso can be used to lubricate bearings and stern tubes along with reduction gears.


Exceeds API CF performance level. Suitable for use in medium speed diesel engines manufactured by leading OEMs like Wartsila,Sulzer etc. covering all the prevailing models.


  • High engine cleanliness under hotter engine conditions.
  • Maximum protections from wear and heavy deposit build-up.
  • Resistance to the negative effects of residual fuel contamination.
  • Excellent thermal and oxidation resistance.
  • Outstanding demulsibility capacity enabling rapid removal of after an ingress.
  • Maintains excellent oil film strength at extreme pressure.

Typical physical Characteristics

TestsTypical Values
Kinematic Viscosity @ 100 deg CMin : 14.0 Max : 16.0
Viscosity Index (min)95
Specific Gravity @ 29.5 deg C0.885
Total Base No. mg KOH/gm30
Pour Point deg C Max-15
COC Flashpoint deg C Min230

Health and Safety

These oils are not hazardous under normal conditions of use. For further guidance appropriate Material Safety Data Sheet may be referred.

Available Size:

210L, 50L, 26L