Quote:
Originally Posted by Artemis
How's your fuel consumption ? Regular type of road surface you drive: hillside area ?
As a base routine, I always reset the odometer and average fuel consumption indicator after refueling. I rely on the odometer in combination with the analog fuel capacity meter, rather than on the range meter (OBC).
My 1M averages around 12/13 liter per 100km for city driving and around 10 liter per 100 km for highway driving.
Official fuel consumption figures released by BMW for the 1M: - Urban: 13.6 l/100 km (i.e. 17.30 mpg)
- Extra-urban: 7.3 l/100 km (i.e. 32.22 mpg)
- Combined: 9.6 l/100 km (i.e. 24.50 mpg)
Fuel tank capacity = 53 liter = average 13.25 liter per space on the fuel capacity meter (4 spaces).
Hence: - 600 km range = average 8.83 liter per 100 km (1 space = 150 km)
- 550 km range = average 9.64 liter per 100 km (1 space = 137.5 km)
- 500 km range = average 10.60 liter per 100 km (1 space = 125 km)
- 450 km range = average 11.78 liter per 100 km (1 space = 112.5 km)
- 400 km range = average 13.25 liter per 100 km (1 space = 100 km)
- 350 km range = average 15.14 liter per 100 km (1 space = 87.5 km)
- 300 km range = average 17.67 liter per 100 km (1 space = 75 km)
- 250 km range = average 21.20 liter per 100 km (1 space = 62.5 km)
A Belgian owner quotes an average ranging between 25 and 30 l/100km ( i.e. between 9.41 mpg and 7.84 mpg), though he has "a spirited driving style". 
See also: http://www.1addicts.com/forums/showthread.php?t=620322 ("Average fuel consumption on the 1M")
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I usually don't drive on flat surfaces, always up and down and lots of short trips with a lot of traffic where the car doesn't warm up at all so I drive slowly, in this conditions I know that the consumption is around 17 liters/100 kms.
I reseted the average fuel consumption 3 tanks ago, and the average of this 3 tanks were 14 liters with some highway cruising at 160/180 kph and some runs to the limiter.
I also came to the conclusion that it's almost impossible to make an average of less than 10 liters in this car even when cruising at 100kph, the consumption is the same at 100kph or at 150/160kph (~10.5/11) which is strange.
How do you do those averages in city driving? I can't see myself doing less than 16 and I drive slowish around town. And also it doesn't seem hard to average 25 in this car if you drive fast which isn't great, the 911 997.2 averages 11 liters crusing at 200+ kph!! The same as my 335d, that's evolution right there!