Perhaps not everyone knows.

[Alfistipohjoosesta]

Finland was well below freezing. Renault outdoor temperature gauge does not show anything if it is colder than -33 C

[Matra_Hans]

That is very interesting and useful to know 

[jack daniels]

how does the power steering feel at those temperatures?

I have driven mostly Toyotas recently and when I drive my Espace now, the steering feels heavy.
Could it just be the cold ( -10 to -20 ) or is the steering a bit heavy on the espace III at low speed?

I dont remember it feeling heavy before. The fluid is just standard mineral oil dexron III.
There is no noise or leakage, pehaps I just need to work-out more often.

[Alfistipohjoosesta]

http://www.valvoline.fi/tuotteet/voiteluaineet/muut/ohjausteh_neste.html

That oil works -40 C my Alfa 166.

Dirty macpherson bearing can make driving heavy.