Well,

it´s quite difficult to precise it because I use the car absolute every day with (heavy) traffic; also but not every day in higways -pretty fast- and, every two or three months in circuits. The circuits are not too long and it is most "fun" but not velocity, with 1st, 2nd, 3er gear in high rpm´s.

So, what I could test till now is 1Liter in 1800 kms. -with the average as I told you-
My alert of low engine oil comes up when
half a liter is missing.