When moisture is mixed in the lubricating oil, not only the strength of the oil film is lowered, but also foam is generated or the oil is emulsified and deteriorated. Lightly, the parts are rusted, causing serious mechanical accidents such as pulling cylinders and burning tiles.
There are three reasons why the water in the lubricating oil exceeds the specified value: one is improper storage, the other is the condensation of oil and gas and water vapor in use, and the other is the leakage of cooling water caused by other reasons such as damage to the cylinder liner.
How to identify whether the water contains moisture in use?
Observation method: Take out the oil dipstick before the engine starts to observe the oil adhering to the dipstick. If there are many small blisters on the dipstick, it means that the oil contains water. It can also be observed after the engine has been started for a while. If the oil contains moisture, the oil will turn milky white with foam. The more water there is, the more foam it has.
Water release method: Before the engine starts or after the flameout (to be completely cooled by the oil temperature), loosely open the oil plug. If there is water, the oil contains more water. Combustion test method: Put the lubricating oil on the hot iron rod or iron net. If there is a "beep" sound, it means that the oil contains more water. A small amount of lubricating oil can also be released and poured into the cup for heating experiments. If the small bubbles in the oil gradually disappear as the oil temperature rises, the oil contains water.