When 2008 model year cars were required to post fuel-mileage based on new government testing earlier this month, economy ratings dropped across the board. However, hybrids suffered the most under the new "real-world" testing — most hybrids saw a 20% decrease in fuel mileage.
Before the new regulations, the most popular hybrid in America — the Toyota Prius — advertised fuel economy of 60 mpg city and 51 highway. After the 2008 rating system, mileage dropped to 48/45 mpg city/highway — much closer to real-world results. But many Toyota dealers are still using the pre-2008 mileage figures.
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