I find this thread amusing, drive any AMG car within UK speed limits and you can get reasonably MPG, mine, a NA 5.5 SLK V8 with a moderate tune and no speed limter gets a regular 35+ MPG going to work M4/M25/A40 and a few B roads.. On a country lane run about 14+.. around town as much as I can as although making noise is fun I like my license and although I am a shell shareholder I am only getting back a minute amount of what I spend. On a recent Autobahn speed run 7.1 MPG.. smiles per gallon is best but burning fuel for noise does not interest me..