What is the best engine oil for Volkswagen Golf?

[DiHazel]

Volkswagen Golf uses original equipment manufacturer (OEM) engine oil, which is produced by Great Wall Lubricant or Shell with a specification of 5W-40 semi-synthetic oil. The official manual recommends using 5W-40 semi-synthetic oil. For Volkswagen Golf models with naturally aspirated engines, semi-synthetic oil is suitable, while models with turbocharged engines require full synthetic oil. If you want to change the oil during later maintenance, you can choose brands such as Shell HX5 SM, Castrol, or Mobil with a specification of 5W-40. The viscosity of engine oil changes with temperature, so it is important to pay attention 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 car. The second number represents the kinematic viscosity of the oil at 100°C. A higher number means the oil can maintain its viscosity better at high temperatures, which can also be understood as better lubrication performance under high-temperature conditions. The method for changing the engine oil in a Volkswagen Golf 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 underneath to catch the old oil until no more oil flows out. Start the engine for about 30 seconds to allow the oil in the main oil passage to drain. Use a specialized wrench to remove the oil filter. Apply some oil to the oil seal of the new oil filter and tighten it clockwise by hand. Add the new oil through the oil filler cap on the engine valve cover. Generally, fill about three-quarters of the 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 there are leaks, perform necessary repairs. After stopping the engine, pull out the oil dipstick and check that the engine oil level is within the standard range.