- 10 - viscosity of the oil in a cold state. The lower this number, the more fluid the cold oil is.
- W - this symbol indicates the suitability of the oil for operation in winter.
- 40 is the viscosity of the hot oil. The higher the number, the thicker the hot oil.
The figure shows the viscosity of engine oils recommended for BMW vehicles depending on the ambient temperature. These oils can be used at almost any ambient temperature.
Note: Oils of different viscosity grades can be mixed with each other if the oil level needs to be topped up.
Additives - no matter what kind - should not be attached to either fuel or lubricating oil.