What Does Used Car Preparation Involve?

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Used car preparation requires replacing engine oil, brake fluid, transmission fluid, and coolant. Below are the details of used car preparation: 1. Engine oil replacement (including oil filter): Engine oil is the most common item encountered during car maintenance. There is actually a lot to learn about choosing engine oil. Firstly, engine oils are categorized by quality grade into mineral oil, semi-synthetic oil, and fully synthetic oil. The biggest differences between them lie in lubrication effectiveness and oxidation resistance duration. 2. Brake fluid: Brake fluid is a crucial part of preparation, as it relates to safety. However, replacement isn't always necessary—it depends on the condition of the brake fluid. The main factor causing brake fluid failure is its water content. Auto repair shops have detection pens to measure water content in brake fluid. If the water content exceeds 4%, replacement is needed. 3. Transmission fluid: Replacement intervals depend on the type of transmission. For manual transmissions, fluid typically needs replacement every 100,000 kilometers. For automatic transmissions, it's around 60,000 kilometers. Additionally, different transmissions require different types of fluid. When selecting transmission fluid, opt for reputable brands with good reviews. 4. Coolant: Replacement isn't always urgent, but prolonged neglect can severely damage the water pump, thermostat, and water channels. Issues like overheating and high engine temperatures are often caused by these factors. Therefore, to protect the car's cooling system, coolant should be replaced regularly.