Uflex Hydraulic Oil/Power Steering Fluid

Uflex Hydraulic Oil: The Right Fluid for Marine Steering Systems

When it comes to maintaining a hydraulic boat steering system, the fluid inside is every bit as important as the helm, cylinder, and hoses. Uflex — one of the marine industry's most recognized names in steering and control systems — takes that philosophy seriously with its purpose-built hydraulic oil and power steering fluid engineered specifically for the demands of on-water operation.

Introducing the Uflex OIL15

Uflex Marine Hydraulic Steering Oil 15 (OIL15) is a premium, aircraft-grade fluid designed for smooth, responsive steering and long-lasting system performance. That "aircraft-grade" designation matters: it signals a fluid formulated to perform under pressure and temperature extremes well beyond typical automotive applications — conditions that any serious boater will recognize as standard fare on open water.

Formulated specifically for Uflex hydraulic steering systems, it delivers consistent viscosity, excellent low-temperature flow, and reliable protection under marine conditions. The fluid carries an ISO viscosity rating of 15cst at 40°C , which is the ideal spec for Uflex helms and cylinders, ensuring the hydraulic circuit responds precisely and without lag regardless of ambient temperature.

Why Use Uflex-Branded Hydraulic Fluid?

The Uflex Hydraulic Fluid (OIL15) is an aircraft-grade oil recommended for use with all Uflex steering helms and cylinders. This is a key point for system longevity: using the manufacturer's own recommended fluid eliminates compatibility guesswork and ensures that seals, O-rings, and internal components remain properly conditioned over time. Substituting off-the-shelf fluids not engineered for marine hydraulic steering can introduce viscosity mismatches, seal degradation, or foaming — all of which compromise steering feel and reliability.

Uflex Hydraulic OIL15 is specifically designed for all Hydraflex hydraulic steering systems , making it the go-to choice whether you're running a basic outboard setup or a more sophisticated multi-engine hydraulic configuration. This hydraulic steering fluid is designed to provide optimal steering performance and system longevity in Uflex boat steering systems, and is sold in convenient 1 US quart containers.

The Uflex Ecosystem Advantage

Established in 1989, Uflex USA is a leader in steering and control systems for the marine industry, with full manufacturing capabilities in Sarasota, Florida, and as an affiliate of the Ultraflex Group, tremendous resources to draw upon for new product development in hydraulics, electronics, and many other technologies. This vertical integration means that when Uflex engineers design a hydraulic helm or cylinder, they also engineer the fluid that runs through it — resulting in a tightly matched, tested system rather than a collection of interchangeable parts.

Trusted by leading boat manufacturers and marine professionals, Uflex USA solutions are designed to withstand harsh saltwater environments while providing reliable, maintenance-friendly operation. Choosing OIL15 is simply the logical extension of trusting Uflex for the rest of your steering system.

Key Features at a Glance

• Aircraft-grade formulation for premium performance under marine pressure and temperature conditions
• ISO viscosity 15cst at 40°C — matched to Uflex hydraulic helms and cylinders
• Excellent low-temperature flow for responsive cold-start steering
• Compatible with all Uflex Hydraflex hydraulic steering systems, including outboard, I/O, and inboard setups
• Available in 1-quart (32 oz.) containers for easy top-off or full system fills

Whether you're doing routine maintenance, bleeding your system after installation, or commissioning a brand-new Uflex hydraulic setup, OIL15 is the factory-recommended fluid that keeps your steering dialed in. Browse the full selection of hydraulic oil and power steering fluid to find the right quantity for your system.