Ive got a 2009 320d saloon,
I used to get 57.6 mpg average on mostly fast a-roads with motorway. After i started using v-power diesel i get between 59.1-62.7 mpg on the same route.
On 50-60mph a-roads my best is 80.4mpg over 15 miles! Was hard work concentrating so hard to achieve that though!