What are the winter car maintenance items?

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Winter car maintenance items include: 1. Maintain the cooling system and add antifreeze. When temperatures are extremely low and conditions permit, antifreeze can be used. Before use, thoroughly clean the cooling system and select high-quality, low-corrosive antifreeze to prevent damage to engine components due to poor-quality antifreeze. 2. Replace various fluids. Choose engine oil with lower viscosity. In low-temperature conditions, engine oil viscosity increases as temperature drops, reducing fluidity. Therefore, timely replacement with lower-viscosity oil can compensate for or eliminate this adverse effect. 3. Maintain preheating devices. For engines equipped with preheating devices (mostly diesel engines), inspect and maintain the preheating equipment before winter to ensure it is in good technical condition. Focus on checking circuits and fuel lines during maintenance to prevent poor preheating device performance from affecting engine startability. 4. Maintain electrical equipment and adjust electrolyte density. Appropriately increase the electrolyte density to prevent the battery case from cracking due to excessively low electrolyte density.