How many liters of engine oil are needed for a BMW 525li oil change?

[OJordan]

BMW 525li requires 6.5 liters of engine oil. Engine oil serves multiple functions such as lubrication, cleaning, cooling, sealing, wear reduction, rust prevention, and corrosion protection for the engine. Here are some key points to note during an oil change: 1. Drain oil when hot: The oil flows better when warm, allowing it to drain more effectively from the oil drain hole, but be cautious not to overheat it to avoid burns; 2. Fill to the dipstick marks: The amount of oil added must be strictly controlled between the lower and upper marks on the dipstick; 3. Do not substitute winter oil: Always change the oil when seasons change, and ensure diesel oil is not mixed—strictly differentiate between them. 4. Use of additives: Common engine oil additives include antioxidants, anti-wear agents, detergents, dispersants, foam inhibitors, and anti-corrosion/anti-rust agents. In reality, finished engine oils already contain these components in specific proportions. Unless you are a professional, avoid altering the oil's formulation to prevent unforeseen consequences or damage.