Originally Posted by Fraggy
The gas costs about 35 cents a gallon more than premium, the car averages only about 7 mpg more than my 335 does now, I will have less power, a less free revving engine, and I will pay several thousand for this, why?
BMW uk site list fuel comsuption at a 42.2mpg combined for the 335d, and 31.0mpg combined for the 335i.
335d is ~27% more efficient or ~180 miles extra per tank(16 gallon tank).
Better on the enviroment, less Co2 emissions.
Less HP, but way more torque, which is actually what moves the car.