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:
The main function of hydraulic oil is to transmit power, similar to gasoline used in cars, providing significant power to the vehicle. Engine oil, on the other hand, primarily functions to reduce engine friction and prevent engine damage.
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:
Generally, engine oil has a relatively higher density, making it more viscous. Hydraulic oil, on the other hand, has a relatively lower density, resulting in lower viscosity compared to engine oil.
4：Different Colors:
Due to its lower density, hydraulic oil tends to have a lighter color. Engine oil, being thicker, appears darker in color.
5：Different Uses:
Engine oil is typically used in gasoline or diesel engines to lubricate and clean the engine. Hydraulic oil, on the other hand, is commonly used in industrial equipment to provide significant power to the machinery.
In summary, hydraulic oil and engine oil should not be mixed, as doing so can exacerbate machinery wear and cause severe damage.
