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What is the difference between engine oil and transmission fluid?

1 Answers
Wendy
07/29/25 10:40pm
Theoretically, engine oil and transmission fluid serve similar functions, primarily including lubrication, cleaning, rust prevention, and heat dissipation. The differences between engine oil and transmission fluid are: 1. Viscosity and temperature tolerance: Engine oil is used for the normal operation of the engine, with the highest temperature tolerance and the lowest viscosity, while transmission fluid is used for the transmission, with lower temperature tolerance and higher viscosity than engine oil. 2. Different functions: The main role of transmission fluid is to keep the car's gear system clean, providing lubrication and cooling for the gear system; engine oil is mainly used to lubricate the engine system, providing lubrication, cooling, sealing, rust and corrosion prevention, as well as shock absorption and buffering for the engine system.
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