What kind of engine oil should be used for German car maintenance?

[SanPeter]

German car maintenance recommends using Castrol brand fully synthetic engine oil. Higher requirements for engine oil: German cars have higher requirements for engine oil. German cars include Volkswagen, Mercedes-Benz, BMW, etc. German cars generally have high internal engine working pressure and high temperature, so they have higher requirements for engine oil. Viscosity requirements: Most German cars require a viscosity of 5w-30 or 5w-40, and most German cars require a viscosity of 30 or above. 0W, 5W, 10W, 15W, 20W, 25W, the symbol W represents winter. The smaller the number before W, the lower the low-temperature viscosity, the better the low-temperature fluidity, and the lower the applicable minimum temperature; 20, 30, 40, 50, the larger the number, the higher the viscosity, and the higher the applicable maximum temperature.