Shell Rimula R3 20W-20 is a monograde lubricant designed for use with diesel engines. It is a heavy-duty oil and its lubricant chemistry has been proven, meaning it can adjust to driving needs whilst providing protection. The product helps to keep pistons, as well as other parts of the engine clean by using a system that works with an active detergent. It provides an excellent level of protection against erosion and the build-up of deposits. It meets the requirements of API CF.