Ther are three types of tests that are normally done on ship

  1. Drop test
  2. Viscosity test
  3. Water content test

  1. Drop Test

  • Take a drop of lube oil from the sample and put it on a filter paper.

  • Wait till the filter paper observe the oil.

  • If the stain on filter paper is light and clear it indicates the oil is fresh and can be used.

  • If the stain is uniformly dark it indicates the oil is in use for some time and can be used.
  • If the stain is very dark it indicates oil should be renewed at the earliest opportunity.
  • If the oil is contaminated with diesel or water the stain will not uniform.
  • The center will be dark and the periphery will be light.

     2. Viscosity Test

  • In the viscosity test the flow of sample is compared with flow of fresh oil.

  • If the difference in the levels between tubes are negligible then the lube is good. You can use it for some more time.

  • If the level in the two sample reads either too high or too low then it indicates contamination. Change the lube oil immediately.

      3. Water Test

  • Water test kit is used to measure the water content in lubricants..

  • Take a small quantity of the lubricant to be tested, along with dry solvent and calcium hydride in a vessel.
  • Calcium hydride react with the water, producing hydrogen gas.
  • The pressure displayed on the gauge is proportional to the percentage or ppm of the water present in the solvent.
  • The gauge can display water content from 10 to 120,000 ppm over five ranges.


  1. thank you so much...i would love to bring more information ..please drop any of your question so that we can find it out and come with best articles for you

  2. Does it observe a oil?


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