Congressional leaders ask for more time to study new fuel rules

Three Congressional leaders on Monday asked top federal environmental and safety officials to extend by 60 days the public comment period on new vehicle emissions and fuel economy standards. The U.S. Environmental Protection Agency and the National Highway Traffic Safety Administration said in a July report that automakers have the technology to meet aggressive mandates to hike fuel efficiency, but improvements will not be as great as the Obama administration once forecast because buyers are swi