averages about 20mpg, but I managed 28mpg on a run back from Derby the other week.
Not too bad if you consider my mates 1.4 clio does 35mpg average with a woman driving very slowly lol!
It is thirsty, but to be expected for the engine size, but I dont think its 'that' bad really considering its a 5.0 V8!
I've not really spent much on it since I have had it. Changed oil myself, only thing I've had done is a ball joint, exhaust mount and MOT.
I think the brake replacement was about £800 though for standard kit, the discs are BMW only and about £200 each for the fronts!
Its been looked after so shouldnt really cost anything, its only if big things go on them it gets expensive, but no reason anything should, they are well built!