I have now done 2,000 kms and find it difficult to measure exactly, as after filling for several minutes it was still frothing, then settling, frothing then settling, so if you do not have the patience to fill right to the brim, then its hard to know exactly how much is in.
Assuming the dealer put 53 litres in.
And if it now has about 58 litres, as I added about 6 litres after first click
then I am getting 4.9 L/100km average over 2,000 kms.
I did a lot of mountain driving up and down hills and very winding roads on the last tank.
I do not do much city driving, lots of highway and country.