Ester Tech Syntec 4+ 10W-40 is a fully synthetic, superior performance 4-stroke competition engine oil. High-grade base oils combined with the revolutionary Ester Tech additive system guarantee outstanding performance in the following areas, among others: A very powerful lubricanting film, even under the most extreme operating conditions Maximum engine performance A very high and extremely stable viscosity index Optimal functioning of the wet clutch Accurate and smooth gear-changing Superior protection against wear Minimum oil consumption as a result of low volatility Ester Tech Syntec 4+ 10W-40 has been exclusively developed for modern, high-tech, high to very high performance race and road motorcycles.