Quote:
Originally Posted by TEF
I own a US spec x3 28d or in short a 2 liter turbo diesel. As for mileage, I never experienced anything like 50 mpg, but have reached 39 to 40 mpg on secondary roads at about 55 mph. While I believe the mileage figures mentioned above, but they tend to come from drivers in the UK. I am wondering if a gallon of gas sold there is imperial gallons versus the ones dispensed here. Secondly, do BMW diesels sold in the UK use Diesel Emission Fluid (DEF) as required here? Would these two factors explain the mileage figures in the UK versus the US?
|
One imperial gallon is equivalent to approximately 1.2 U.S. liquid gallons.
I own a late 2013 X3 xDrive 30d M Sport. That is the 3 litre, 256 BHP diesel.
The UK cars have a Diesel Particulate Filter (DPF) to control emissions.
The UK 2.0d has the same DPF.
Yesterday I did a 210 mile trip with mixed driving including some fast motorway sections to the Brecon Beacons and averaged 37.1 mpg. At one stage after around 100 miles it was averaging 41.1 and rising because I was driving on slow urban roads in ECO Pro mode.
Comparing UK & US Gallons and MPG figures using the same math:
The UK uses Imperial Gallons whereas the US Gallon is not the same.
If you were to travel 200 miles on 5 UK gallons you would average 40 mpg. 200/5 = 40
If you were to travel 200 miles on the same quantity of fuel but measured as 6 US gallons and expressed as a gallon you would average 33.33 mpg. 200/6 = 33.33
If you understand what I am saying? It is the same liquid quantity of fuel.