What is the difference between transmission oil 75w85 and 75w90?
1 Answers
The differences between transmission oil 75w85 and 75w90 are as follows: 1. Different viscosity indexes: Both 75w85 and 75w90 are SAE viscosity grades. Transmission oils can be divided into single-grade viscosity types and multi-grade all-weather types, with single-grade viscosity types further classified into high-temperature and low-temperature types. 75w85 and 75w90 belong to the multi-grade all-weather type, and their difference lies in the low-temperature viscosity variation. 2. Different flow characteristics: 75w85 and 75w90 have equivalent high-temperature performance, but 75w85 has lower low-temperature viscosity, better fluidity, and stronger low-temperature performance. 75w90 is specifically designed for use in many railway transmissions.