Power steering fluid compatibility depends on the exact specification in your owner’s manual, reservoir label or service information. A steering system can require dedicated power steering fluid, a specific ATF or a central hydraulic fluid. Check that requirement before choosing any of these five bottles.
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Power steering fluid compatibility by product
| Product | Published type | Fit check |
|---|---|---|
| Lucas 10442, 16 fl oz | Power steering fluid with conditioners | Compare the fluid maker’s suitability statement with the exact vehicle requirement. |
| Prestone AS261, 32 fl oz | Power steering fluid, per the exact retailer listing | Current maker page lists AS261Y. Verify the supplied SKU and label. |
| Royal Purple Max EZ 01326 | Power steering fluid and conditioner with synthetic base oils | Confirm the vehicle allows the specific service fill and mixing arrangement. |
| LIQUI MOLY 20038, 1 L | Fully synthetic central hydraulic fluid | Match the required standard or original part number to LIQUI MOLY’s current recommendation. |
| Red Line 30404, 1 qt | Power steering fluid | Use only where the vehicle’s required service-fill specification is supported. |
- Lucas 10442 Check Amazon availability
- Prestone AS261 Check Amazon availability
- Royal Purple Max EZ 01326 Check Amazon availability
- LIQUI MOLY 20038 Check Amazon availability
- Red Line 30404 Check Amazon availability
Lucas 10442 power steering fluid with conditioners
Lucas identifies 10442 as the 16-fl-oz conditioner formulation. Its product sheet describes suitability for many steering systems, including Honda and Acura systems. That is a Lucas compatibility statement. Verify the OEM requirement for your model and follow any instruction to use a specified original fluid. Lucas 10442 product data
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make a fitment decision.
Prestone AS261 32-fl-oz fluid
The existing product link identifies AS261, 32 fl oz. Lowe’s also lists AS261. Prestone’s current family page includes AS261Y alongside other sizes. Check the delivered SKU and instructions rather than transferring service-life claims from a similarly named bottle. Match the actual fluid specification before topping off. AS261 retailer details · Prestone current fluid family
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make a fitment decision.
Royal Purple Max EZ 01326
Royal Purple identifies Max EZ as a fluid and conditioner made with synthetic base oils. Its page states mixing compatibility with stock and stock-replacement power steering fluids. Verify the vehicle’s permission and exact required specification before mixing. Pump life and steering noise also depend on the system’s condition. Royal Purple Max EZ product page
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make a fitment decision.
LIQUI MOLY Central Hydraulic System Oil 20038
The manufacturer lists 20038 as a 1-liter central hydraulic fluid. Its recommendation list includes BMW 81 22 9 407 758, Ford WSS-M2C 204-A and VW G 002 000/G 004 000. These are manufacturer recommendations for specified requirements. Check the exact requirement and the label because some hydraulic systems need a different grade, even within the same vehicle brand. LIQUI MOLY 20038 recommendations
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make a fitment decision.
Red Line 30404 power steering fluid
Red Line identifies 30404 as the quart package. It publishes compatibility for selected older Dexron, Mercon and Type-F service-fill requirements in steering systems, as well as specific OEM numbers. Read that list against your owner’s manual. A steering-fluid application statement does not authorize filling a transmission with this product. Red Line 30404 data and compatibility
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make a fitment decision.
Check the reservoir and service instructions
- Identify hydraulic, electro-hydraulic or fully electric steering. A fully electric system does not have hydraulic fluid to top off. An electrically driven hydraulic pump can still have a fluid reservoir.
- Find the exact fluid code and level-check procedure. Color, a generic compatibility claim and the word “synthetic” cannot identify the required fluid.
- Check at the specified temperature and vehicle position. If a top-off is permitted, clean around the cap, add the specified fluid in small amounts and stay within the marked range.
- Follow the service information for flushing and bleeding. If fluid is repeatedly low, identify the leak. Stop driving and arrange help if steering effort changes suddenly or steering control is compromised.
Fluid loss calls for diagnosis. A conditioner or stop-leak product cannot repair a damaged hose or rack. Keep ignition and steering maintenance separate. Steering-fluid leak guide · Spark-plug fit guide
FAQ
How do I know which steering fluid my vehicle takes?
Look up the exact steering-system specification in the manual, service information or reservoir label. Confirm the part number and compatibility statement for the bottle you intend to use.
Can I mix power steering fluids?
Follow the vehicle’s directions and the exact product label. A generic statement about mixing does not override a vehicle requirement for a specific fluid.
Is central hydraulic oil the same as ordinary steering fluid?
Central hydraulic systems can require a specific grade for steering or other hydraulic functions. Match the manufacturer’s required code and service procedure before adding any fluid.
Does electric power steering use fluid?
A fully electric steering system has no hydraulic fluid to service. Electro-hydraulic designs still use a hydraulic circuit. Check which system your vehicle has.
Will topping off fix a steering leak?
A top-off may restore the level temporarily when the vehicle procedure permits it. Repeated loss requires leak diagnosis and repair. Arrange help if the steering feels unsafe.
Product photos and listings
Unverified chart The retained image has no documented sample or calculation. Use the cited product information to make a fitment decision.
| Product | Image and listing |
|---|---|
| Lucas 10442 | Check Amazon availability |
| Prestone AS261 | Check Amazon availability |
| Royal Purple Max EZ 01326 | Check Amazon availability |
| LIQUI MOLY 20038 | Check Amazon availability |
| Red Line 30404 | Check Amazon availability |
Sources checked on November 11, 2026. The specifications and suitability statements above come from the cited labels or product pages.
