What is the appropriate level to fill the coolant to?

[Zane]

Coolant should be filled to the midpoint between the upper mark (MAX) and the lower mark (MIN). Relevant information about coolant is as follows: Replacement cycle: The shelf life of automotive antifreeze is generally 2 years. Typically, ordinary household vehicles require antifreeze replacement every 2 years or after driving 40,000 kilometers. Introduction: Antifreeze, fully known as antifreeze coolant, refers to a coolant with antifreeze properties. It is a type of coolant containing special additives, primarily used in liquid-cooled engine cooling systems. Currently, over 95% of antifreeze used domestically and internationally is ethylene glycol-based aqueous antifreeze, characterized by a high boiling point, low volatility, moderate viscosity, minimal changes with temperature variations, and excellent thermal stability, making it an ideal coolant. The primary function of antifreeze is to remove excess heat from the engine cooling system while preventing the cooling water in the pipes from freezing and expanding in winter, which could lead to radiator damage.