Use mine for work. 11000 miles since may. Makes the commute pleasurable even though much of it is motorway. About 35 mpg. I never turn sport off.... 
Whenever I find myself feeling like I need to be punished, rather than turning sport mode off, I simply hitch up to the nearest caravan and hey presto!

Much the same effect and much more practical; not to mention the pleasing/calming effect on other road users

(if you can't find a caravan, any large heavy object - such as a small planet - will suffice!)