Full synthetic heavy-duty performance diesel engine oil that can help extend engine life while providing long drain capabilities. Engineered with state-of-the-art technology to help deliver exceptional performance in modern low emission engines. Meets or exceeds demanding specifications of major truck manufacturers, which means a single engine oil formulation can be used for mixed fleet operations. Sold as a case of six 1 quart bottles. Helps reduce low-temperature sludge buildup and high-temperature deposits. Enhanced film strength at high temperatures. Supports wear protection and reduced oil consumption. Helps maintain viscosity in severe, high-temperature service. Exceptional low-temperature pumpability. Supports easier engine startup, helps reduce wear. Helps extend life of critical wear surfaces. Helps to deposit control and extended drain capability.