i do a 50 mile motorway and dual carriage way commute 2 days a week, used to do it 4 days but now i use my missus car
i dont get bored of it, i put in £30 to cover the 2 days so probably a tad over 20 litres of vpower.
on a long run i had about 40mpg coming back from cornwall, i got just over 400 miles to the tank. i have k100 now so il see what its like when i go back down to cornwall next month.
EDIT- just to add, i find i get better fuel cunsumption sitting at 70mph compared to 60mph