How to judge the quality of an oil by its color, smell, stickiness and test strips.
With the rapid development of the automotive industry, motor oil has attracted more and more attention as an important element to protect and lubricate the engine. However, there are many brands of motor oil on the market, and the quality is uneven, and choosing a high-quality engine oil has become an indispensable task for every car owner. This article will introduce how to judge the quality of engine oil by color, smell, viscosity and test strips, and help readers improve their ability to identify the quality of engine oil.
1. Color is an important indicator for judging the quality of engine oil.
First of all, we need to pay attention to the color of the oil. Normally, a good fresh oil should be clear or golden yellow. If the oil becomes darker or black, it may be due to contamination of the oil during use, such as carbon deposits, dust and other impurities inside the engine. In addition, if the color of the oil is milky white or cloudy, it means that the oil may be diluted and may contain water or other liquids. Therefore, the quality of the oil can be preliminarily judged by the change in color.
Second, the smell may reveal the state of the oil.
Secondly, we can sense the smell of motor oil through our sense of smell. Under normal conditions, a good motor oil should emit a slight oily smell. If the oil has a strong sour or burnt smell, it may be that the oil contains too much oxidizing agent or combustion products. Also, if the oil emits a pungent smell of sulfur, it means that the oil may contain harmful substances such as hydrogen sulfide. Therefore, through the observation and discrimination of odors, we can understand whether the oil is in a normal state or not.
3. Viscosity reflects the lubricating performance of the oil.
Viscosity is also one of the important indicators to judge the quality of engine oil. Viscosity is a measure of the fluidity of an oil and is usually expressed as the mass of oil flowing through a unit area per unit of time. Static viscosity mainly reflects the flow performance of the oil at low temperatures, while dynamic viscosity reflects the flow properties of the oil at high temperatures. Too low or too high viscosity of the oil can adversely affect the operation of the engine. Therefore, car owners can judge the quality of engine oil by checking whether the viscosity of the oil is appropriate.
Fourth, the test strip helps to understand the moisture and acid value of the engine oil.
Finally, we can also use test strips to determine whether the moisture and acid number in the oil exceeds the standard. The test strip usually reacts in the oil and changes color, which shows the state of the oil. For example, some oil test strips can reflect the moisture content in the oil, and when the color of the test strip changes, it means that the oil contains too much moisture. In addition, some test strips can also be used to test the acid number of the oil, which is too high to indicate that the oil may have oxidized or contaminated. Therefore, the use of test strips can provide more accurate information on the quality of the engine oil and help car owners make the right choice.
Conclusion: In summary, the color, odor, viscosity and test strip detection of engine oil are important means to judge the quality of engine oil. By observing the color change of the engine oil, we can preliminarily determine whether the oil is contaminated;By smelling the smell of the oil, we can know if the oil is in a normal state;By measuring the viscosity of the oil, we can judge whether the lubricating properties of the oil are suitableBy using test strips, we can find out if the moisture and acid number in the oil are exceeded. Therefore, the comprehensive application of these methods can help car owners choose high-quality engine oil to ensure the normal operation of the engine.