Mercury 858027K01 Premium Plus 2-Stroke Marine Oil Mercury Premium Plus 2-Stroke Marine Engine Oil is specifically formulated to meet the needs of high-horsepower outboards in extreme marine operating conditions. It contains a higher concentration marine additive package and is blended with the highest quality ash-less dispersants. Mercurys Premium Plus oil far exceeds the Mercury in-house test standards, which are more stringent than the industrys TC-W3 standard. Size 3.78 L 1 US gal Benefits o