The XTeer HD7000 CI-4 15W-40 5L-Syn is a premium synthetic diesel engine oil designed to provide superior protection and performance for heavy-duty engines. It meets the CI-4 specification, ensuring excellent protection against wear, soot, and high-temperature deposits. The 15W-40 viscosity provides reliable performance across a wide range of temperatures, making it ideal for both on-road and off-road applications. This oil helps extend engine life, reduce maintenance costs, and improve fuel efficiency, all while maintaining optimal engine cleanliness and performance. The 5L packaging is convenient for larger engine oil changes.