What type of engine oil is used for Audi A4?

[LaHazel]

Audi A4 uses engine oil with the specification 5W40. If you want to change the oil during later maintenance, you can choose well-reputed brands such as Mobil, Shell, or Castrol. The official manual recommends using engine oil with a viscosity of ASE 5W-40, which complies with the Volkswagen standard 50200. The viscosity of engine oil changes with temperature, so special attention must be paid to its performance under both low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity. 5W means it can withstand temperatures as low as -30°C. The smaller this number, the better the low-temperature fluidity, ensuring smoother cold starts for the car. The latter number represents the kinematic viscosity of the oil at 100°C. A higher value means the oil can maintain its viscosity index better under high temperatures, which can also be understood as better lubrication performance under high-temperature conditions. The method for changing the engine oil in an Audi A4 is as follows: Wait for the engine temperature to drop, allowing the oil to flow back into the oil pan; Use a wrench to loosen the oil drain plug and place an oil pan to catch the old oil until no more oil flows out. Start the engine and let it run for 30 seconds to allow the oil in the main oil passage to drain out; Use a specialized wrench to remove the oil filter; Apply engine oil to the oil seal of the new oil filter and tighten it clockwise by hand; Add the new engine oil through the oil filler cap on the engine valve cover. Generally, fill about three-quarters of a standard oil container; Start the engine and let it run for 5 minutes. Check for any oil leaks around the oil drain plug and oil filter. If leaks are found, perform necessary repairs; After stopping the engine, pull out the dipstick to check if the engine oil level is within the standard range.