For an engine, the greater the viscosity of the oil, the better. The greater the viscosity, the greater the protection for the engine. Viscosity is not equal to consistency, but the greater the consistency, the worse it may be for the engine. In order to achieve the ideal viscosity and fully protect the engine, many engine oils are synthetic processes, such as nanotechnology. Strictly speaking, today's petroleum is a chemical product, not a simple petroleum product. The viscosity of engine oil is not as high as possible. When choosing engine oil, you must try to choose the engine oil suitable for your own engine, so as to give full play to the performance of the engine.

So obviously, the higher the viscosity of the engine oil, the better. Excessive viscosity of engine oil will lead to an increase in engine fuel consumption, a decrease in power and poor lubrication effect during cold start. As a daily user, how to choose and judge the quality of lubricating oil? Choose a brand. Famous brands and trademarks are the guarantee of product quality. There are many fake and shoddy products now. We must change the oil at the official fixed maintenance point. Fixed customer service stations dare not fool. Now it is recommended to add a lot of 5w-30 engine oil, which is the oil standard that most cars can use.

The higher the grade, the better the viscosity, and the better the high temperature resistance and oxidation resistance. Cf, Cl and CH are all advanced engine oils. Because our engine is a metal part, it needs to run at high temperature and high speed, which requires our gay friends to cover the surface of our metal parts at all times, cool and lubricate the engine, and sign and judge the quality of lubricating oil. Look at the oil pressure gauge.

The idle oil pressure of hot car is still high and the stability is good. This is a ... cold car is not thick, hot car is not thin. After starting the engine for a long time, pull out the dipstick and rub the oil with your hands. It feels sticky. When the oil change limit is reached, the oil viscosity is still good, the color is still clear, and the pressure of the pressure gauge remains unchanged. Satisfy the above conditions, the basic judgment is good oil. To sum up, the lubricating oil with higher viscosity is a good lubricating oil, but it is not thick when cold, not thin when hot, and the lubricating effect remains unchanged. Therefore, it is suggested that when choosing engine oil, you must choose the most suitable engine oil label and don't blindly try some extreme methods.