Originally Posted by Sedan_Clan
I was just about to say that. 23.5 mpg in a 400 HP V8 is great!!! My Interlagos E46 M3 averaged about 22 to 23 mpg when I babied it during driving. You should be impressed!
Congrats on the wonderful car. Interlagos looks great on the new M3.
What makes UK mpg any different than US mpg? How do they differentiate it? Also, I read that somebody else is getting 28mpg UK (..so about 23-25 mpg US).
A U.S. gallon (3.785 litres) is smaller than a UK gallon (4.546 litres).
Therefore 23.5 mpg in the UK is actually 19.6 mpg in the U.S.