Sierra 18-9540-3 Tc-W3 Full SyntheticFormulated to improve performance and extend engine life, this high performance lubricant is ideal for today's high horsepower outboards that demand maximum performance. It is a direct replacement for the BRP XD 100 2 stroke oil. It reduces ring sticking, deposit formation, and exhaust port blockage, allowing for easier starting, and results in significantly reduced aquatic toxicity compared to other outboard oils on the market today. Its great for