What is the difference between gear oil 75w90 and 80w90?

1 Answers
CamilleAnn
07/30/25 10:48am
75w-90 and 80W-90 gear oils differ only in viscosity. Below are the viscosity specifications for these two gear oils: 75w-90 viscosity: The kinematic viscosity of 75w-90 gear oil at 100°C is 4.1mm2·s, and the maximum temperature to reach 150Pa·s is -40°C. 80W-90 viscosity: The kinematic viscosity of 80W-90 gear oil at 100°C is 7.0mm2·s, and the maximum temperature to reach 150Pa·s is -26°C.
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