Is Power Steering Fluid the Same as Hydraulic Oil?

1 Answers
Ronald
07/29/25 1:17pm
Power steering fluid and hydraulic oil are not the same. The main differences between the two are as follows: Different functions: Power steering fluid is filled in the power steering system, serving to transmit steering force and provide cushioning. Hydraulic oil is a hydraulic medium used in hydraulic systems that utilize liquid pressure energy, playing roles in energy transmission, wear resistance, system lubrication, corrosion prevention, rust prevention, and cooling within the hydraulic system. Different performance requirements: Hydraulic oil operates under pressure, requiring high viscosity and low fluidity, whereas power steering fluid has low viscosity and requires high fluidity. Common hydraulic oil viscosities include grades 46 and 68. The viscosity of power steering fluid is typically below 40.
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