Not as easy as I thought... with COVID '19 anall. I spent €1,110 on diesel, that's straightforward but kilometreage is subject to extrapolation given the following excerpts from my service records:
17/02/2020 = 150,625
02/04/2021 = 159,956
01/12/2021 = 170,754
09/02/2022 = 180,012
so I'd guesstimate
9,331 *3/13 = 2,153
+ 10798 = 10,798
+ 9258 / 2 = 4,629
which gives 17,580 kilos for €1,110 = €6.31/100 kilos
That's not right anyway... Not sure whether my computations or assumptions are out but, I'll go with the latter.
The car reports 6.7 litres/100 kilos for the last c.3,300 kilos which works out at €11.10 at the price I paid in Certa yesterday (165.8c/litre).