Why is the coolant in the Cruze always decreasing without visible leaks?

[Lori]

Coolant in the Cruze may decrease without visible leaks due to two main reasons: natural consumption and coolant entering the cylinders and participating in combustion. How to choose coolant: The basic indicators of coolant are freezing point and boiling point. The market offers coolants with freezing points of -15°C, -25°C, -30°C, -40°C, etc. Generally, it is advisable to choose a coolant with a freezing point at least 10°C lower than the lowest temperature in your region. Can different coolants be mixed? It is necessary to use the same brand of coolant. Different brands of coolant may have different production formulas. If mixed, various additives may react chemically, causing the additives to become ineffective. Coolant replacement cycle: For vehicles that run for long periods, such as taxis, high-quality coolant should generally be replaced once a year. For vehicles with shorter running times, replacement can be done every two years or every 30,000 kilometers. To prevent excessive foam formation, which can reduce the heat exchange efficiency between the coolant and engine components, ensure the product is within its validity period when adding it. Long-life coolants can have a validity period of up to three years. If suspended solids, sediments, or signs of deterioration or discoloration are found in the coolant, replace it promptly and clean the system.