Quicksilver - Premium Plus 2-Stroke Marine Engine Oil Synthetic Blend 858028Q01. Overview. Every boater wants the same thing - an engine that just works. No surprises, no smoke, no odd sounds-just clean, dependable power that gets you home every time. That's what Quicksilver Premium Plus 2-Stroke Marine Engine Oil delivers. It's made for people who spend weekends on the water, not just reading about it. Whether you're chasing fish at sunrise or towing the family in the afternoon, this oil keeps