Yes my 1.6 HDi Exclusive gives the constant readouts of 42.5, 62.3, 72.4 etc - I can only assume it is due to the conversion from litres to gallons. I also find the computer very innaccurate - I have checked my fuel consumption manually and can confirm that it reads about 5 - 6 mpg on the optimistic side, so I don't take much notice of it now..