Makes BMW6 Series

BMW 6 Series MPG

Its best-rated version reaches 26 MPG combined in 2012–2013, the 640i Coupe. Its weakest year peaked at 15 MPG (1988).

lowest to best versionbest versionmedian of its classengine list turned over

652.2 gal

a year at 15,000 miles for the best 2019 version, the 640i Gran Coupe. Put it next to its 1984 predecessor, at your own mileage.

Compare in gallons

The BMW 6 Series has EPA ratings for 21 model years, 1984–2019, most often among subcompact cars. In 1986 its most efficient version still placed fifth from the bottom of 56 subcompact cars, where the Rolls-Royce Corniche/Continental rated lowest.

Averaged over 2004–2008, the best version of the 6 Series placed fifth from the bottom of 24 among subcompact cars rated at least three years in that span. The name disappeared from EPA's lists after 1989 and returned in 2004, 14 model years later.

Among 46 compact cars, 2019

The 6 Series placed 38th (tied). The class leader was the Toyota Prius c at 46 MPG. The next higher rating, 24 MPG, is shared by two nameplates.

The 6 Series, five years at a time

Average rating of its best version per span, placed among subcompact cars.

1984–8851st of 57

2004–0820th of 24

2009–1321st of 31

2014–1821st of 34

Where the engine list turned over

1985
New: 3.4-liter 6-cylinder. Best rating 18 → 17 MPG.
2006
New: 4.8-liter 8-cylinder. Best rating 19 → 18 MPG.
2012
New: 3.0-liter 6-cylinder, 4.4-liter 8-cylinder. Best rating 18 → 26 MPG.

All 21 model years, best and lowest version

Model years	Best version	Combined	City / hwy	Lowest version	Versions
2019	640i Gran Coupe	23	20 / 29	20	6
2018	640i Convertible	23	20 / 29	19	10
2017	640i Coupe	24	21 / 30	18	13
2016	640i Coupe	24	20 / 30	18	13
2015	640i Coupe	25	21 / 31	19	13
2014	640i Coupe	25	22 / 32	19	12
2013	640i Coupe	26	23 / 32	19	9
2012	640i Coupe	26	23 / 32	17	8
2008–2010	650ci	18	15 / 23	16	4
2006–2007	650ci	18	15 / 23	15	6
2004–2005	645ci	19	16 / 24	16	6
1989	635csi	16	14 / 21	15	2
1988	6 Series	15	14 / 19	12	3
1987	6 Series	16	15 / 20	12	3
1986	6 Series	17	15 / 20	16	2
1985	6 Series	17	15 / 20	17	2
1984	6 Series	18	15 / 22	18	2

Version names in the EPA list: 6 Series, 635csi, 640i Convertible, 640i Coupe, 640i Gran Coupe, 640i xDrive Convertible, 640i xDrive Coupe, 640i xDrive Gran Coupe, 640i xDrive Gran Turismo, 645ci, 645ci Convertible, 650ci, 650ci Convertible, 650i Convertible, 650i Convertible xDrive, 650i Coupe, 650i Coupe xDrive, 650i Gran Coupe, 650i xDrive Convertible, 650i xDrive Coupe, 650i xDrive Gran Coupe, Alpina B6 Gran Coupe xDrive, Alpina B6 xDrive Gran Coupe.

Same class, 2019

Toyota Prius c46 MPG Lexus IS24 MPG Subaru WRX23 MPG Rolls-Royce Dawn14 MPG