The core difference between hydraulic oil and engine oil lies in their use, composition, viscosity and temperature/pressure resistance. Here is detailed analysis:
1. Different Uses
Hydraulic oil is mainly used in hydraulic systems to transmit power and lubricate system components (such as hydraulic pumps, valves, etc.). For example, in engineering machinery or industrial equipment, it drives mechanical operation through pressure changes.
Engine oil is specially used inside the engine to lubricate moving parts such as pistons and crankshafts, and also has cleaning, heat dissipation and sealing functions.
2. Composition Difference
Hydraulic oil contains anti-wear agents, rust inhibitors and antioxidants, focusing on the stability and pressure resistance of hydraulic systems.
Engine oil is added with detergent dispersants, anti-wear agents and antioxidants, and is designed to remove engine carbon deposits and disperse impurities.
3. Viscosity Requirements
Hydraulic oil requires a higher viscosity to ensure fluidity in high-pressure environments (such as in hydraulic pumps).
Engine oil has a relatively low viscosity to meet the lubrication needs of the engine under high-temperature environments. For example, when starting at low temperatures, it needs to have strong fluidity to reduce wear.
4. Temperature and Pressure Resistance
Hydraulic oil needs to adapt to a wider temperature range (-40℃ to 120℃) and withstand high-pressure environments.
Engine oil has a slightly lower temperature resistance (-30℃ to 150℃), but it needs to cope with extreme conditions of high engine temperature and high speed.
For the different characteristics of hydraulic oil and engine oil, FUOOTECH developed and designed Series HOC Vacuum Hydraulic Oil Filtration Machine and Series LOP Vacuum Lubricating Oil Purifier Machine.
HOC Vacuum Hydraulic Oil Filtration Machine
LOP Vacuum Lubricating Oil Purifier Machine
*Supplementary risk warnings
(1) Irreplaceable use: Hydraulic oil lacks the detergent and high-temperature stability required by the engine. Long-term substitution will cause carbon deposits, wear and even engine failure.
(2) Compatibility issues: Hydraulic oil may corrode the engine's rubber seals, causing oil leakage risks.
