N52B25 (2.5si). To be fair, after I put the fuel treatment in the tank, I reset the mpg counter and went for a long-ish drive which did not involve too much low gear work so I dare say the figures will come down a bit once I get back to doing the daily commute to work. I was still pleasantly surprised though.
Been down to see @enuff_zed today for another oil change, plus new seats and door cards (finally got sports seats, yay!), and replacing a particularly stubborn camber bolt.