Mercury – High Performance 4-Stroke Marine Engine Oil | Verado Series | Synthetic Blend | 8M0053664Mercury High Performance 4 Stroke Marine Engine Oil Verado Series Synthetic Blend 8M0053664 Overview Theres a certain comfort in knowing your engine is protected by the same oil trusted by boaters who push their rigs hardhour after hour, tide after tide. Thats exactly what you get with the Quicksilver 25W 50 Synthetic Blend Marine Engine Oil 8M0053664. When you fire up your Mercury Verado or another high performance four stroke, you can feel the