100% Synthetic - Ester engine oil is formulated and developed to meet the most stringent requirements of  operating in polar extreme conditions Specially designed for high performance snowmobiles 4 Stroke engines: Yamaha, Ski-doo/BRP, Artic Cat, Lynx… Outstanding engine protection at high rpm and high temperature Faster rev raisings and maximum power output Easy start up in polar cold Avoid starter clutch sliding