Understanding the Different Types of Power Steering Fluid

Choosing the right type of power steering fluid is essential for protecting your power steering pump, rack and pinion, and hydraulic lines. Using the wrong fluid can cause leaks, reduced steering performance, or even damage to seals and components.
Below, we’ll break down the main types of power steering fluid, their uses, and which vehicles they’re best suited for.

Power Steering Fluid

Mineral Oil-Based Power Steering Fluid

Mineral oil power steering fluid is the most traditional type, often used in older vehicles and European models. It’s petroleum-based and offers excellent lubrication, corrosion resistance, and low foaming.

🔹 Key Benefits:

Provides smooth and consistent steering response
Gentle on seals and rubber hoses
Affordable and easy to find

⚠️ Best For:

Classic cars, older models, and vehicles that specifically call for mineral-based power steering fluid in their owner’s manual.

Automatic Transmission Fluid (ATF)

Many American and Asian automakers recommend Automatic Transmission Fluid (ATF) for their power steering systems. While not originally designed for steering, ATF contains friction modifiers, detergents, and conditioners that help maintain smooth hydraulic pressure.

🔹 Key Benefits:

Excellent detergency keeps the system clean
Widely available and cost-effective
Reduces internal wear and protects pump components

⚠️ Best For:

Vehicles that specify Dexron, Mercon, or ATF+4 fluids in their manual. Using ATF in a system not designed for it can cause seal damage or performance issues, so always verify compatibility first.

Synthetic Power Steering Fluid

Synthetic power steering fluid is engineered for modern cars, trucks, and SUVs, especially those equipped with high-performance or cold-weather steering systems. It’s made from chemical compounds designed to withstand extreme heat and temperature fluctuations.

🔹 Key Benefits:

Superior temperature resistance and oxidation stability
Reduces wear on pumps and internal components
Improves steering smoothness in hot or cold conditions
Longer service life compared to conventional fluids

⚠️ Best For:

Newer vehicles, performance models, and drivers in extreme climates who want optimal protection and smooth steering response.

Universal Power Steering Fluid

Universal power steering fluids are formulated to meet or exceed the specifications of multiple OEM brands. These are ideal for general automotive use, especially when you’re unsure of the exact fluid type or want a one-product solution for multiple vehicles.

🔹 Key Benefits:

Compatible with a wide range of vehicles
Provides strong anti-wear and anti-foam protection
Reduces noise and extends component life

⚠️ Best For:

Drivers, mechanics, or shops that service different vehicle brands and models.

Choosing the Right Power Steering Fluid

When selecting a power steering fluid, always check your vehicle’s owner’s manual or OEM specifications. Using the correct fluid type ensures:

Maximum steering response and precision
Reduced pump and seal wear
Longer component life
Protection against oxidation and foaming

For the best results, use OEM-approved fluids that match your vehicle’s original standards. Our AAA Million Auto Parts Power Steering Fluid is formulated to deliver OEM-grade protection and smooth hydraulic performance for most cars and trucks.