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Is Power Steering Fluid the Same as Hydraulic Oil?

2 Answers

VonLucas

08/31/25 8:09am

Power steering fluid and hydraulic oil are not the same. Below are the specific introductions of power steering fluid and hydraulic oil: 1. Power steering fluid: Power steering fluid, also known as steering assist fluid, is a special liquid used in the power steering pump of a car. Through hydraulic action, it can make the steering wheel very light, similar to automatic transmission fluid, brake fluid, and shock absorber fluid. 2. Hydraulic oil: Hydraulic oil is oil produced through hydraulics. Hydraulics is a term used in the mechanical and electromechanical industries. Hydraulics can be used as a power transmission method, known as hydraulic transmission. It can also be used as a control method, referred to as hydraulic control.

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DeAlexander

09/13/25 4:21am

As a car enthusiast, I often get asked if power steering fluid and hydraulic oil are the same thing. I believe they are related but different. Power steering fluid is primarily used in a car's steering system to help the steering wheel turn smoothly, while hydraulic oil is a broader term applicable to hydraulic systems in machinery like cranes or agricultural equipment. Although both work on the principle of transmitting power through pressure, power steering fluid is specially designed for automobiles, containing anti-wear additives and corrosion inhibitors to protect delicate seals. Using regular hydraulic oil as a substitute may result in heavier steering, premature seal damage, or even leaks. It's best to check your car's owner manual, which specifies the required type. Regularly checking the power steering fluid level is also crucial to avoid compromising driving safety.

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