What are the precautions when changing car engine oil?

[VonKing]

Precautions when changing car engine oil are: 1. Perform the operation when the engine is warm to ensure the old oil is drained as completely as possible; 2. Add the new oil and ensure the amount is appropriate; 3. After adding the oil, start the engine and check all components for any leaks. Run the engine for 3 minutes to confirm the oil level reaches the normal mark. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and cushion shocks. The steps for changing engine oil are: 1. Lift the car, remove the undercover, and place a container of about 10 liters under the oil drain plug; 2. Unscrew the drain plug, use an air gun to blow into the oil filler port for two minutes, then tighten the drain plug and wipe it with a paper towel to check for leaks; 3. Reinstall the undercover, lower the car, and use a funnel to add the new oil through the filler port.