Mercury - Quicksilver 10W-30 Full Synthetic Motorcycle Oil Engine Lubrication & Protection Full Synthetic Formula 8M0128369. Overview. There's a feeling every rider knows - that moment when the engine settles into its rhythm, smooth and steady, ready for whatever stretch of road comes next. Whether you're cruising through town, climbing a dirt trail, or opening up the throttle on a long straightaway, you want an oil that keeps up with you. Quicksilver 10W-30 Full Synthetic Motorcycle Oil deliver