Automotive Oil analysis

Source: Machinery Lubrication

What is the importance of oil analysis

Regular sampling and analysis of the oil is a practical way of getting a direct indication of the condition of the oil, and thereby also an indirect indication of the condition of the respective components. Oil samples should be taken regularly. A single sample, or irregular sampling will not give sufficiently accurate information. The best information is obtained if one or more intermediate samples are performed between samples taken at oil change, since these give more information concerning the condition of the component and the oil itself. If samples are only taken at oil changes, they give relevant, but limited information.

Note: Note that oil changes that are extended over the limits recommended in the service scheduled or driver recommendations can damage the engine, and invalidate the warranty.

Source: NRMA

How to take Engine Oil sample

Samples can be taken by installing a sampling valve on the engine or via the dipstick tube. The instructions for the sampling equipment should be followed accurately. The following points concerning sampling are important:

◾ Oil samples should be taken while the oil is hot and well mixed.

◾ The sample should be taken after some of the oil has run out, so that sediment is avoided.

◾The sample should never be taken from the oil filter.

◾ Always use clean sampling equipment, bottles etc. and ensure that the area around the sampling area is cleaned carefully before performing the sampling.

◾ If a sampling valve is fitted, the system should be flushed before sampling to ensure that the sample is representative for all the oil in the engine.

Source: TestOil

How to take Gearbox and axle oil sample

The following points concerning sampling are important:

◾The sample must be taken through the drain plug.

◾ Oil samples should be taken while the oil is hot and well mixed.

◾The sample should be taken after some of the oil has run out, so that sediment is avoided.

◾ Always use clean sampling equipment, bottles etc. and ensure that the area around the sampling area is cleaned carefully before performing the sampling.

The results of oil sampling can vary between different components, even if they are the same size and are made by the same manufacturer. Decisions should be based on regular sampling. Also note that repairs often cause changes in results until the new parts are run in.