Is 75W-85 gear oil too thin?

1 Answers
LaJuliet
07/30/25 2:42am
75W-85 has relatively low viscosity and is recommended for winter use. Here is more information about gear oil: 1. Viscosity suitable for seasons: 75W refers to the viscosity index of gear oil. In southern regions, especially during hot summers, it is not recommended to use gear oil with this viscosity. In southern summers, 90W is used, while 80W is used in winter. 2. Impact of improper gear oil on the engine: If gear oil that is too thin is used in some transmissions, the wear resistance of the bearings is significantly reduced, shortening their service life. Gear oil with excessively high viscosity affects cold-start performance, increasing the engine's running resistance and making it difficult to start successfully on the first attempt. 3. Method for selecting appropriate gear oil: Based on local temperature characteristics, use transmission gear oil reasonably. This effectively protects transmission components without increasing the cold-start operating load of the engine.
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