Well it was a total of about 6,500Km.
Istanbul to London in 2 days on outbound leg(Bari to Calais in less than 24hours
); London to Istanbul ona more leisurely timetable of 3 days !
DSt1 you are absoluely correct.....its just as well that the fuel capacity only gives a range of 200km because after the first day of in excess of 1,000km by 200 your backside is screaming for a rest.
However the north Greek mountain roads and the Kavalla by-pass ( East of Thessaloniki) are just a dream on a Duke; makes it all worthwhihe