DETROIT - President Obama announced new automobile fuel-efficiency standards yesterday that require an average 54.5 miles per gallon by 2025. But even if the auto industry manages to meet the new standards, it is unlikely car buyers will see many fuel-economy stickers boasting such high mileage.
Instead, the average new vehicle in 2025 will probably be closer to 43 miles per gallon, based on the typical 20 percent discount applied by federal officials when rating a car or truck in real world driving conditions. http://www.boston.com/lifestyle/green/articles/2011/07/30/new_auto_mileage_standards_leave_room_for_interpretation/
Article courtesy of The Boston Globe-Green Blog by Bill Vlasic New York Times