HD Expert 50/50 Pre-Diluted Extended Life Heavy Duty Antifreeze/Coolant Premium is designed for use in older model of light & heavy duty diesel vehicles, including, but not limited to; Caterpillar, Cummins, Detroit Diesel/MTU, GM Heavy Truck, Freightliner, PACCAR and Volvo Mack. The antifreeze/coolant will provide best protection against rust and corrosion for all coolant system metals, including aluminum, while providing extended protection against wet sleeve liner cavitation pitting and extreme temperature variations ranging from -37°C to 129°C, preventing summer overheating and winter freezing, when used in accordance with OEM (Original Equipment Manufacturer) and product manufacturer’s guidelines regarding product dilution. HD Expert Premium is compatible with older model of light & heavy duty diesel applications on-road, off-road, farm, marine & stationnary applications.