Frankie, thank you very much for your input.
The factor you pointed out "electrical": I really know that they are not affecting my numbers.
Lately, we are having no ice, neither snow, therefor I am not using the heating
.
I am also not using any heating in the steering wheel, neither heat on my seats.
The only electrical consumption I am having is on the radio and on the light beams. Nothing else.
I have been driving basically in flat locations, not mountains and with 2 normal weight persons, basically just commuting from home to work.
Today, I was able to stop in only 2 red traffic lights, no other stops, with normal city speed and the final trip numbers was: 11.4 liters/100 km.