Thanks for the test - excellent English
That fuel consumption for UK gallons is:
20l/100km=14mpg
23l/100km=12mpg
26l/100km=11mpg
for US gallons its even worse.
Whilst the actual cost of extra fuel used is relatively small (compared to depreciation) it is still something which would really get to me because it must limit the range to what, 200 miles ?