Should Passat use 5W30 or 5W40 engine oil?

[OLila]

All Passat models are equipped with turbocharged engines. It is recommended to use 5W40 or 0W40 engine oil. If the Passat has severe oil consumption, 5W40 oil is better. The viscosity of 40 is higher than that of 30, which can alleviate oil burning. The fuel consumption range of the Passat 280 model is 6.33~8.21L/100km, with an average fuel consumption of 7.56L/100km; the 330 model's fuel consumption range is 7.25~9.64L/100km, with an average of 8.44L/100km; the 380 model's fuel consumption range is 7.72~10.81L/100km, with an average of 9.25L/100km. There are many brands of engine oil on the market, such as Mobil, Shell, Castrol, Total, etc. Additionally, specifications vary. When selecting engine oil, it's essential to understand the meaning of the oil label: the low-temperature viscosity grade is divided into 0W, 5W, 10W, 15W, 20W, and 25W. The smaller the number, the better the low-temperature cold start performance. The viscosity grade at 100°C is divided into 20, 30, 40, 50, and 60. The higher the number, the higher the viscosity. Simply put, the number before the W represents the oil's cold resistance. For example, 0W oil will freeze at -35°C, while 5W oil will freeze at -30°C. The choice of engine oil is also related to the engine's structure. Japanese and American car engines are designed relatively precisely and are suitable for low-viscosity oils such as 0W20 and 5W20. Many German car engines are turbocharged, so higher viscosity oils like 5W20 and 5W30 are chosen. Domestic car engines often draw inspiration from Japanese cars, with some models directly using Mitsubishi engines, so oil selection can refer to Japanese cars. Alternatively, just choose the specification and model required by the car maintenance manual.