Which type of engine oil is best for an Audi A3?
1 Answers
Audi A3 requires engine oil with the specification 5W-40. The viscosity of engine oil changes with temperature, so special attention should 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, resulting in smoother cold starts for the vehicle. The latter number represents the oil's kinematic viscosity at 100°C. A higher value indicates better ability to maintain viscosity at 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 A3 is as follows: Wait for the engine temperature to cool down, allowing the oil to flow back into the oil pan; Use a wrench to loosen the oil drain plug and place an oil pan underneath to catch the old oil until it stops flowing. Then, start the engine and let it run for 30 seconds to allow the oil in the main oil passages to drain out; Use a specialized wrench to remove the oil filter; Apply some oil to the gasket of the new oil filter and tighten it clockwise by hand; Add the new engine oil through the oil filler cap on the engine's valve cover. Generally, fill up to three-quarters of a standard oil container; Start the engine and let it run for 5 minutes, then check for any leaks around the oil drain plug and oil filter. If leaks are found, repairs should be made; After stopping the engine, pull out the oil dipstick to check that the oil level is within the standard range.
