MPG needs to die.
As MPG numbers get higher and higher, the numbers shown and the numbers in real world are going to be more and more disparate, even though the percentage that they are different might be the same.
it wasn't a big deal when a truck claimed 15 mpg but the best a driver could get was 13mpg, but because the numbers are only 2 away from each other, it's not a big deal, but when it's 40mpg real world, vs 47mpg advertised, omg, the sky is falling!
Reality is, that the yearly difference in price between 40 and 47mpg is about $150.
Even if you made 14mpg instead of 15mpg on your truck the price difference was higher than that ($200).
meh, stupid way of displaying gas mileage is stupid and needs to go away.