Mercury – SAE 0W-30 Full Synthetic Power Steering Fluid | Verado & Zeus Systems | 858077K01

Overview

Precision steering isn’t just about control — it is about trust. When you turn the wheel, you expect your boat to respond instantly, without noise or hesitation. Mercury SAE 0W-30 Full Synthetic Power Steering Fluid keeps that connection steady and reliable, even under the toughest marine conditions. It’s made specifically for the advanced steering systems powering Mercury Verado outboards and Joystick Piloting setups, giving you that smooth, confident feel whether you’re maneuvering in tight marinas or cruising offshore.

Key Features

• Full synthetic marine power steering fluid for modern Mercury systems.
• Optimized for Verado, JPO, and Zeus drive steering and transmission actuators.
• Delivers exceptional thermal stability and corrosion protection.
• Prevents foaming and oxidation for smooth, quiet steering.
• Provides consistent viscosity and performance across wide temperature ranges.
• Comes in a 1-quart bottle for complete system maintenance.

Engine & Boat Compatibility

• Designed for Mercury Verado electric steering systems.
• Compatible with Joystick Piloting for Outboards (JPO) and Zeus drive systems.
• Intended for electric and assisted power steering, not manual or hydraulic helm systems.
• Ideal for high-performance outboards, offshore cruisers, and premium yachts.

Performance & Practical Benefits

There’s nothing more satisfying than steering that feels right — smooth, tight, and completely under control. That’s what this Mercury Marine part delivers. Its synthetic base oil resists oxidation and temperature breakdown, ensuring your steering stays responsive no matter how long you run. You’ll feel the stability in every turn — firm but fluid, even at speed.

The anti-foam and anti-corrosion properties protect pumps, seals, and actuators from the wear caused by constant pressure and saltwater exposure. Even after long days in harsh environments, the system stays quiet and efficient. The result is steering that feels more precise, more connected — the way Mercury intended.

It’s the kind of reliability that keeps you focused on the horizon, not what’s happening below deck.

Why Buy OEM

When it comes to maintaining high-performance systems like Verado or Zeus, there’s no substitute for OEM. This genuine Mercury power steering fluid is formulated by the same engineers who designed those systems, so you know it’s right. It’s tested in salt, heat, and real-world vibration to ensure you get consistent performance and protection.

Generic alternatives can fall short under marine stress, leading to foaming, inconsistent feel, or even component wear. With Mercury OEM fluid, you know your system is protected — and that your boat will handle like it did the day you first took it out.

FAQ Section

Q1: Which systems use Mercury 0W-30 Power Steering Fluid 858077K01?

It’s made for Mercury Verado, JPO, and Zeus systems that require synthetic power steering fluid.

Q2: Can I use it in non-power hydraulic steering?

No, it’s intended only for electric and assisted power steering setups.

Q3: What’s the benefit of using synthetic over conventional fluid?

Synthetic oil maintains stable viscosity, prevents foaming, and resists oxidation, especially under heat and load.

Q4: Is it safe for saltwater use?

Absolutely — it’s formulated for corrosion protection in all marine environments.

Q5: How often should it be checked?

Follow your Mercury owner’s manual, but inspecting fluid levels before each season is a smart practice.