320i M Sport Efficent Dynamics

[leah1]

Hi,
Looking at getting a e90 320i m sport the post 57 plate that now come with the Efficent Dynamic engine,on autotrader they state that mpg is only about 3mpg thirtier in all urban,extra urban and combined compared to the older e90 320d engine?Its between one of these and the 320d m sport E90 but in my budget i can get a younger and lower mileage petrol than if i choose a 320d m sport,

does anyone own one
Any feedback on mpg