"What is the problem with MPG? Consider a decision between two cars: a current vehicle and a new vehicle that is more efficient. Which improvement will save the most gas over 10,000 miles?
A) An improvement from 10 to 11 MPG
B) An improvement from 16.5 to 20 MPG
C) An improvement from 33 to 50 MPG
Surprisingly, all save about the same amount of gas over 10,000 miles: About 100 gallons."
Read more here:
http://www.mpgillusion.com/p/what-is-mpg-illusion.html
