Mobil Coolant Heavy Duty Ready Mix -36C is a ready-to-use, phosphate-free, ethylene glycol based, heavy-duty diesel engine coolant. It provides optimum protection against cavitation erosion, corrosion, scale, overheating, and freezing for all heavy-duty cooling system applications. Mobil Coolant Heavy Duty Ready Mix -36C is formulated with a proprietary blend of inhibitors that provides superior protection for all metal alloys found in heavy-duty cooling systems. It is also compatible with all types of water, including hard water. Mobil Coolant Heavy Duty Ready Mix -36C is pre-charged with a high quality Supplemental Coolant Additive (SCA), which helps to ensure proper chemistry is maintained at every top-off. This coolant is also low in total dissolved solids, which helps to prevent scale buildup. Mobil Coolant Heavy Duty Ready Mix -36C is recommended for use in all heavy-duty diesel engines, including on-road trucks, off-road mining equipment, farm equipment, and marine applicatio