Mercury - SAE 0W-30 Full Synthetic Power Steering Fluid Verado & JPO Systems 858076K01. Overview. There's a distinct confidence that comes when your steering responds exactly as it should - quick, quiet, and smooth, no matter the water conditions. That feeling doesn't just happen; it's built on the small details that keep your boat running right. Mercury SAE 0W-30 Full Synthetic Power Steering Fluid is one of those details. Designed for the advanced steering systems that drive Mercury Verado out