On top of its lower CO2 emissions, the 335d gets much better fuel mileage than all other 3-Series. It even gets better fuel mileage than both of the 1-Series models, BMW's smallest offering. And you don't have to baby the throttle to get its quoted 36 highway/23 city fuel rating. We managed around 32 mpg highway, and as we said earlier, we were flooring it every time we could.