lol what the @&%#? you make no sense. If everyone has their excuses (I didnt get what you meant by using this word but im using it since you understand it) and most of their excuses are to buy a big *** 7 series then it becomes a trend which is something like a mentality.
I bought a 4.8 liter car instead of the 5 liter M5 due to the HUGE DIFFERENCE in MILEAGE :rolleyes:.
535i mileage: 16 / 24 mpg
550i mileage: 15 / 22 mpg
M5 mileage: 11 / 17 mpg:eek:
so you see the difference in the mileage of the 535i and the 550i is very slight compared to the mileage of the M5. 
Google is your friend:*.
and your last point is absurd.