Further refinement to the ecu fuel & iginition map has just given us a return of 380 miles to a tank last week, with approx 4 litres still left in the tank just short of a gallon, therefore it was on for a 400 mile return.
Most of this was mix driving, with a variety of roads. Our engine has now covered 157k with no real issues, I personally have put 23k on the car since buying it in Sept 2004, every mile has been enjoyable.