The test kit "LUBE OIL CHECK 5" is designed for regular on-board monitoring of 5 crucial parameters of engine lube oil: water in oil, base number (BN), oil viscosity, salt water and soot contamination. Routine in-service oil analysis can help to early detect any off-specification issues (ongoing degradation of the oil quality, abnormal wear) and changes in the oil condition (oil contamination) before an actual problem occurs, thereby improving the engine system maintenance planning.

The content of water in oil and base number is measured by means of the test device "TWIN CHECK 4.0" in two identical test procedures. The concentration of water in oil can be determined in the range from 0 – 1.0 vol. % H₂O and the BN value can be measured from 0 to 150 BN. The test results are directly available on the digital display of the "TWIN CHECK 4.0" unit.

Viscosity test of the used oil sample in comparison to the fresh oil sample is determined with the help of the "VISCOSITY COMPARATOR". The test result is immediately visually observable in the form of a go/no go answer.

The degree of soot concentration in the oil sample is determined by means of the "SPOT CHECK" test.

The "SALT/ FRESH WATER CHECK" helps to provide immediate confirmation whether the water-in-oil contains any salt or not.