Think your car isn’t living up to the official MPG numbers? You’re not the only one, which is why a project is looking at creating a standard global mileage test.
A paper by the International Council for Clean Transportation (ICCT) compared real-world results posted on a popular website with official figures and found that the gap grew from 8.0 percent in 2001 to 21 percent in 2010.
The council is worried that those results mean that carbon dioxide emissions aren’t falling as fast as some would think.
The ICCT argues that the mpg tests do not accurately represent real-world driving. Both the EPA test, and European tests have a cycle of stops, starts, accelerations and decelerations in a precise manner, which is just not how things happen on the road.
The ICCT also explains that the tests allow for earlier gear changes which skews the results for a better emissions rating.
Additionally, the council points out that the European tests are less effective than the U.S. tests because auto makers only test the base version, which are usually lighter and would rate better than the higher optioned models. In the U.S. the EPA usually tests best-selling vehicles.
There has been a project underway by the United Nations to create a global mileage test that would better represent actual real-world driving situations, and could translate anywhere around the world. It has encountered some delays, but is expected to be put into application in Europe as soon as 2017.
[Source: Wards Auto]