The EPA has revised the 2012 328i (F30) MPG figures down by 3MPG to 33MPG. According to BMW:
All manufacturers are responsible for testing and submitting fuel economy figures each year to the EPA (based on physical tests following the EPA test cycle on a dynamometer). Occasionally, the EPA will validate the figures that we provide. When this happens, there are sometimes small changes in the published EPA fuel economy figures (usually 1 mpg up or down).
The EPA recently tested the 2012 328i Automatic and obtained a highway mileage result that was 3m pg lower (33mpg versus 36mpg) than the BMW test result. We are very surprised by this result and are currently working to determine how this is possible. The new rating seems abnormally low … CONTINUED