A technology-specific Mercury 4 Stroke FC-W SAE 25w40 Synthetic blend was formulated for the world's first and only supercharged and intercooled outboard engine. The unmatched torque and acceleration of this engine requires maximum protection found in this well-balanced combination of today's highest quality synthetic and mineral base stocks. Verado Oil meets the stringent marine operational requirements of all Mercury's 4- and 6-cylinder Verado models. First-in-class for all FC-W durability test properties, with industry-leading internal marine engine corrosion protection.