The four-stroke marine engines used in transport ships and large passenger ships may contain quantities of oil of several thousand litres. These use a wide variety of lubricants and combustants, with a wide variety of potential problems.
In large two-stroke engines, whose cylinders are individually supplied with fresh oil, the system oil may become mixed with the cylinder oil. The HFO (heavy fuel oil) which is used as fuel, with fluctuating quality, can also enter the engine oil.
For marine engines, condition monitoring using oil analyses is essential, as this is the only way downtime can be avoided during journeys lasting weeks and maintenance work can be planned precisely for the next port of call. In our SDA analysis kit for two-stroke engines, the oil in each cylinder is investigated separately, in order to produce the most precise findings regarding wear and feed rate.