They got advised in one of the Siberian cities to install double windows on the cars. Those double windows help a lot in keeping warm.
When it is -60 F (-50 C) outside, the car windows never get rid of the ice and snow. Even when the heater is on to its maximum.
Here you can see the reading of the thermometer: -49 C (-56 C).
Those rusian guys made photos of their travel
across Siberia in January 2006.
The average temperature outside was -60 F. Yes, minus sixty fahrenheit.
They have visited different cool places in Siberia. For example this is a Jewish region right in the middle of cold Russian Siberia.