can you put any power steering fluid in a car

[LaDeclan]

No, you cannot use any power steering fluid in a car. Using the incorrect type can damage the power steering pump, rack and pinion, and other components, leading to costly repairs. The right fluid depends entirely on your car's make, model, and year, as manufacturers specify fluids with specific chemical formulations and viscosity ratings to protect their unique systems.

The primary distinction is between traditional hydraulic power steering systems and newer electric power steering (EPS) systems. Cars with EPS don't use hydraulic fluid at all, so adding any fluid is unnecessary and could cause damage. For hydraulic systems, the main types are:

• Automatic Transmission Fluid (ATF): Many older American and Asian vehicles (e.g., Ford, GM, Toyota, Honda) use Dexron or Mercon-type ATF.
• Specific Power Steering Fluids: Many European brands (e.g., VW, Audi, BMW, Mercedes) and some others require a dedicated, manufacturer-specific power steering fluid. Using ATF in these systems can swell seals and cause leaks.
• Synthetic Universal Fluids: Some aftermarket fluids are marketed as "universal," but it's critical to verify they meet your car's specific manufacturer specifications (e.g., Chrysler MS-5931, Honda/Acura 08206-9002PE).

Using the wrong fluid can lead to premature wear, noisy operation (whining sounds), stiff steering, and complete system failure. Always check your owner's manual for the exact specification.

Car Manufacturer	Typical Recommended Fluid Type	Key Specification to Look For	Potential Risk of Using Incorrect Fluid
Ford, GM (older)	ATF (Dexron/Mercon)	Meets Dexron II/III or Mercon	Pump failure, seal damage
Toyota, Honda	Specific PS Fluid or ATF	Check manual for exact type (e.g., Honda PSF)	Increased wear, noise
Volkswagen, Audi	Pentosin-based Hydraulic Fluid	CHF 11S, CHF 202	Seal swelling, leaks, corrosion
BMW, Mercedes	Specific Synthetic PS Fluid	CHF 11S	Damage to pump and rack
Chrysler, Jeep	Specific PS Fluid	MS-5931	Pump failure, steering issues

[JackAnn]

As a mechanic, I see this mistake all the time. People grab whatever's cheap and end up with a loud, whining pump or a leaky rack. It's not a one-size-fits-all situation. Your car's manual has the answer—it tells you exactly what to use. It only takes a minute to check and can save you a thousand-dollar repair. Stick with what the manufacturer says, every time.

[AndresFitz]

I learned this the hard way with my old truck. I topped it off with a generic fluid, and within a week, the steering got stiff and it started making a horrible groaning noise. My mechanic said the wrong fluid ruined the seals in the pump. It was an expensive lesson. Now I just buy the exact brand and type listed in the owner's guide. It's not worth the risk to guess.