Should we change the oil viscosity in hot weather

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Should we change the oil viscosity in hot weather

With the season gradually into the deep summer, the weather temperature continues to rise, recently individual areas are up to 39 ° C high temperature, rumors are circulating that: high temperature, only high viscosity oil can really play a role in lubrication and protection. With the approach of summer, many car owners began to hesitate to give the car to replace the summer oil, then the need to deliberately change the viscosity of the oil for the summer?

First, the oil performance analysis of the viscosity of the lubricant on the normal operation of the engine is crucial, in order to prevent the engine parts parts of the contact surface wear, the lubricant must have enough viscosity, so that in a variety of temperatures, can be very good in the formation of the oil film between the engine parts and is not destroyed, so as to enable the engine to run smoothly. Therefore, some car owners will think that the higher the viscosity of the oil, the better, when the temperature is high, the viscosity must also be high.

Theoretically speaking high temperature should use high viscosity oil, which is not wrong. However, most of the oils sold on the market now are four-season general-purpose oils, and there is a big difference in the use of traditional motor oil habits. In the case of normal engine operation, high-quality motor oil viscosity and other properties will not change as the temperature rises, and will not quickly become thin. Like 5W-30 and 10W-30 such low viscosity oil, stronger high temperature performance and oxidation resistance, anti-shear, in the summer high temperature season has been a good adaptability.

Second, automobile performance analysis

Now the production of automobiles in the use of new metal materials, processing precision, the application of electronic technology has changed a lot, with good film continuity and fluidity, so the general automobile does not need to adjust the viscosity level of the oil for the summer. It is sufficient to select the oil viscosity according to daily use or according to the recommendations of the vehicle manual. If individual car owners for the winter specifically reduce the viscosity level, you can adjust the oil viscosity for the summer properly.

Third, which cases are recommended to increase the viscosity of the engine oil?

1, the car is not good, the engine wear is serious, the gap between the components is very large, low-viscosity oil is easy to scurry to the combustion chamber to participate in the combustion, the formation of carbon deposits, it is difficult to meet the full lubrication, and the oil consumption is large. You can consider raising the viscosity level of the oil, for example, if you used to use 30 oil, you can now choose 40 oil. The mileage of 150,000 kilometers below the car in good condition, in accordance with the vehicle manual recommended oil viscosity can be.

2, long-distance transportation of heavy-duty vehicles. The extreme pressure of the rotating parts is very large, with high viscosity oil is not easy to oil film fracture.

3, extreme speed vehicles, such as more than 160 mph racing. At this point, the race car due to the super high temperature generated by the speed, the need for higher viscosity oil to maintain the lubricity of the engine, the general vehicle running on the highway can only be called high speed rather than extreme speed.