2016 BMW 6 Series Fuel Economy

EPA ratings by trim

City and highway are EPA's adjusted label figures; combined is the 55/45 blend printed on the window sticker. For electric and plug-in trims the MPG columns are MPGe, and the kWh per 100 miles is the figure a charging cost actually turns on; EPA measures it at the wall, so charging losses are already in it. Unrounded combined figures, where EPA publishes them: 640i Convertible 23.4065; 640i Coupe 23.8662; 640i Gran Coupe 23.4065; 640i xDrive Convertible 23.0002; 640i xDrive Coupe 23.0002; 640i xDrive Gran Coupe 23.0002; 650i Convertible 19.6325; 650i Coupe 19.6325; 650i Gran Coupe 19.6325; 650i xDrive Convertible 18.3982; 650i xDrive Coupe 19.2666; 650i xDrive Gran Coupe 18.3982; Alpina B6 Gran Coupe xDrive 18.3982.

What the rating costs per mile

The rating divided by a price, times your miles. It starts at EIA's current U.S. averages and EPA's 15,000 miles so the right-hand column is comparable; type your own pump price, home rate and mileage over them.

Fuel only — before depreciation, insurance, maintenance or tires, which the True Cost per Mile Calculator adds. Most drivers land below the rating; the True MPG Calculator measures your own from two fill-ups.

EPA's own figures, and why they differ

The “EPA's figure” column is EPA's annual fuel cost from the same file: 15,000 miles, 55% city, and the national fuel price fueleconomy.gov was using on the day the file was built (2026-09-29). fueleconomy.gov recomputes its page every week at the current price, so its number and the file's drift apart between file dates; the middle columns here use a price you can see and change, which is the only honest way to compare two cars. EPA also prints a five-year “you save/spend” against the average new vehicle (spends $5,000 for the 640i Coupe); it rests on the same assumptions and is not repeated here as a result.

Every figure on this page is a rating, not a measurement of any particular car. The site never calls a rating wrong; it shows what your own price and miles do to it. See the model on fueleconomy.gov.

Other model years of the BMW 6 Series: 2019, 2018, 2017, 2015, 2014, 2013, 2012, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 1989, 1988, 1987, 1986, 1985, 1984.