Why Does Antifreeze Change Color?

[LeBrody]

Antifreeze changes color due to deterioration, which not only reduces its antifreeze effectiveness but also diminishes its cooling performance for the engine. When the engine operates at high temperatures without adequate cooling, the viscosity of the engine oil decreases, leading to prolonged wear on engine components and, in severe cases, potential engine failure. Antifreeze is designed to prevent the coolant from freezing in cold winter conditions, which could otherwise crack the radiator or damage the engine block. It is primarily used in liquid-cooled engine cooling systems, offering protection against freezing in winter, boiling in summer, scale formation, and corrosion.