LOCOMOTIVE POWER 10W30 CI-4/SL is a Semi Synthetic heavy-duty engine oil that provides excellent lubrication in today’s diesel and gasoline engines operating in severe applications. It is designed using the high-performance base oils which provide excellent low temperature fluidity, high temperature viscosity retention and volatility control. Momenta Nano is engineered to provide a strong foundation for oxidation resistance, soot handling, and wear control. It provides excellent piston deposit protection and reduced sludge formation to help provide long engine life.