The article mentions "40 miles a gallon (U.S.) or about 5.9 litres/100 km" for a medium sized car (think Toyota Corolla). Doesn't strike me as "super-efficient" at all, this is what cars have been doing for years already! Or am I missing something?
The United States Environmental Protection Agency (EPA) laboratory measurements of MPG have consistently overestimated fuel economy.[ This results in a shortfall of about 15 percent in actual vs. measured CAFE goals. Starting with 2008-model vehicles, the EPA has adopted a new protocol for estimating the MPG figures presented to consumers. The new protocol includes driving cycles more closely representative of today's traffic and road conditions, as well as increased air conditioner usage.
