Just to add more data to this thread. Monday it was around -5C. I got 5.9l/100km for 21.8k of all city driving. Once the car got warm, I did a reset on trip B and it showed 5.2l/100km for about 17km of driving. It takes about 4-5km of driving to get the engine warm.

This morning, it was -18C. I got 6.2l/100km for the same route. Traffic was about the same. Once the car was warmed up, did a reset and got 5.5l/100km for about 17km of driving.

Thanks,
Stephane.