I purchased my 159 on the 11/02/12 and these are my stats.
Trip A on the computer was reset when purchased and registered 34mpg on my run home when purchased and now reads 35.2mpg. Trip B I have set up to register each full tank and currently reads 46.9mpg.....
This can't be good for my engine as I am barely stroking the accelerator keeping the revs under the 2k mark. Once this tank is spent I'll be putting the foot to the carpet.
Below are my readings from Fuelly.com
Date Miles completed UK MPG Fuel
6 12/03/2012 544 TBC BP Standard + 1 shot Millers
5 06/03/2012 227 37.7 BP Ultimate Diesel + 2 x shot Millers
4 02/03/2012 493 Sainsburys full tank + 1 x shot Millers
3 23/02/2012 497 Sainsburys half tank
2 16/02/2012 466 35.4 Sainsburys full tank
1 11/02/2012 33.9 Total Fuel full tank
I will provide an update on my next fill up.