Experts find key to saving fuel: say gallons per mile

Turning a car’s fuel efficiency on its head by stating it in “gallons per mile”, instead of “miles per gallon” helps potential customers choose the greenest option when they upgrade, said the team at Duke University in North Carolina.

In The MPG Illusion, published in the US journal Science yesterday, Richard Larrick and Jack Soll at the university’s Fuqua School of Business describe how the use of miles per gallon is misleading and causes people to grossly misjudge the environmental impact of upgrading to a new car.

Guardian