Prestone Command Nitrite Free Extended Life antifreeze+coolant is designed to work with all Class 1-8 vehicles: Heavy Duty and Light Duty. It is compatible with all vehicles, coolant colors and any Nitrite Free OAT engine.  OEM Approvals/Registrations: This product meets Cummins Eng. Std. CES14439, Detroit Diesel 93K217 Disposing of used antifreeze/coolant: Dispose of contents and containers in accordance with local and national regulations. *TOP-OFF: Will maintain extended life protection when added to any OAT Extended Life antifreeze/coolant. FLUSH AND FILL: Receive protection for up to 600,000 miles (965,000 km) or 12,000 hours with a complete flush and fill using Prestone Command Heavy Duty Nitrite Free Extended Life Concentrate.