What is the normal temperature range for antifreeze?

[DeLila]

Antifreeze's key indicators are its freezing point and boiling point. In the market, antifreeze is available with freezing points of -15°C, -25°C, -30°C, -40°C, etc. Generally, it's advisable to choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region. Antifreeze replacement method: Before completely replacing the antifreeze, conduct a thorough inspection to check for any leaks or cracks in the pipes, with a focus on the five-way hose. The five-way hose is named for its five connection points to various parts. Antifreeze flows through the five-way hose and is distributed to different parts of the car to function. If there are signs of antifreeze leakage in this part, replace the hose or resecure the connection as needed. Drain the old antifreeze, then flush the liquid channels with clean water. Add clean water to the antifreeze reservoir, then continue filling the reservoir with water to allow it to circulate continuously through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. The water initially draining from the reservoir will have a faint pink tint. Keep adding clean water until the drained water runs clear. Note: Remember to remove the heater hose and drain the water from the heater core. After draining for about an hour, add the new antifreeze through the radiator hose, which allows the antifreeze to flow quickly into the radiator. Then add another bottle of antifreeze to the reservoir until it's nearly full. Start the engine and let it run for about 10 minutes. During this time, the coolant level will drop slightly as air is purged from the system. Top up the antifreeze to the "MAX" mark on the reservoir.