Should Volkswagen 1.4T use 5W30 or 40?

[DylanRose]

Volkswagen 1.4T should use 40. Compared to 5W30, 40 oil has higher high-temperature viscosity and better sealing performance, but its fluidity is relatively poorer with greater resistance. Here are some precautions for oil usage: 1. Oil quantity: The oil level should be slightly below the mark on the dipstick, do not overfill. Excessive oil not only increases the rotational resistance of the crankshaft but also reduces the engine's output power. Moreover, the excess oil may enter the combustion chamber and participate in combustion, leading to oil burning, blue smoke emission, and increased fuel consumption. 2. Oil selection: Choose oil with different viscosities based on the engine's operating condition. If the engine is in good condition and the seasonal temperature is low, oil with lower viscosity should be used. If the engine is severely worn and the seasonal temperature is high, oil with higher viscosity should be selected.