Normal week = bit of steady driving and a bit of thrashing her gives me about 26-29mpg imperial (31 - 35 us)
Pissed off week = thrashing her all the time gets around 20 mpg imperial (24 us)
return trip from my parents trying to get the best possible milage per gallon = 37mpg imperial (44.5 us) and that's cruising at 70mph motorway and 60mph normal roads.