5100 4T 10W40 Ester is a semi-synthetic motor oil designed for 4-stroke motorcycle engines. It combines ester-based additives with traditional oils to provide strong protection against wear, reduce friction, and enhance engine performance. Ideal for both street and off-road riding, it offers excellent lubrication in a wide range of temperatures. This oil helps maintain engine cleanliness, improve power delivery, and ensure smoother operation, contributing to longer engine life and reliable performance in various riding conditions.