85w-90 gear oil is a multi-grade viscosity all-weather gear oil, which does not require high temperature and can be used throughout the year. Generally speaking, it is more suitable for cars with manual transmission. Different from the automatic transmission, the manual transmission has the advantages of simple structure and low maintenance components. Choosing 85w-90 gear oil is more in line with the maintenance requirements.
Gear oil is divided into low temperature gear oil and high temperature gear oil, "w" stands for low temperature gear oil. The value in front of "w" represents the low temperature viscosity of the gear oil, and the number behind it represents the viscosity of the gear oil at high temperature. The larger the value, the higher the viscosity. The lower the value, the more fluid it is. From the numerical range, the low temperature viscosity and high temperature viscosity of 85w-90 gear oil are not limit values.
Different from 85w-140 gear oil, the high temperature viscosity of 85w-90 gear oil is lower. But this is not to say that 85w-140 gear oil is better, but that when the car has higher requirements for high temperature viscosity, 85w-140 gear oil can be selected. If it does not have too high requirements on the viscosity of the gear oil at high temperature, you can choose 85w-90 gear oil.
In daily life, some people often compare 85w-90 and 80w-90. It can be seen that the values after "w" are the same, which means that the high temperature viscosity values of the two are the same. But both numbers before w are different. This shows that the low temperature viscosity of the two is different. Compared with 85w-90, 80w-90 has lower viscosity at low temperature, better fluidity, stronger low temperature adaptability, and is more suitable for low temperature environment.
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