Hydraulic oil and engine oil both serve similar purposes such as anti-wear, cooling, rust prevention, cleaning, sealing, etc. However, in reality, there are significant differences between the two in terms of their functions, additive components, viscosity, etc. The specific differences are as follows:

1:Different Functions:

2:Different Additive Components:

Due to the differences in functionality, there are significant variations in the components added to the oils. Engine oil contains various functional additives such as detergents and dispersants, while hydraulic oil additive components include antioxidants, rust inhibitors, anti-wear additives, etc.

3:Viscosity Index:

4:Different Colors:

5:Different Uses: