Of course the diesel engine is not just about performance but about fuel efficiency. The EPA rates the 335d at 23 mpg city and 36 mpg highway with a 27 mpg combined rating. In our own time with the car, we averaged 30 mpg in mix of city and highway driving. An extended road trip at constant highway speeds can easily yield mileage in the upper 30s. By way of comparison the gas powered 335i which also has a twin turbocharged 3.0-liter in-line 6 is rated 17/26 mpg city and highway. The 335d starts at $43,900 which is about $1,700 more than the similar automatic transmission 335i. The 335d (and the diesel powered X5) are currently eligible for a $900 federal tax credit due to their fuel efficiency. Of course like any other premium German machine, that starting price is just that. Injudicious use of the option list can easily elevated the out the door price to nearly $70 grand. Even with a bottom line closer to the base price, the 335d provides all the characteristics one expects of a BMW with

Source: Luxist