Customers stand in line as Jaqueline Henderson, right, prepares to pump gas at a station in Portland, Ore., Friday, July 29, 2011. President Barack Obama and top auto executives are set to unveil ... more 
Customers stand in line as Jaqueline Henderson, right, prepares to pump gas at a station in Portland, Ore., Friday, July 29, 2011. President Barack Obama and top auto executives are set to unveil details of a compromise to slash the amount of gasoline cars and trucks will need down the road. The deal will double fuel economy standards to 54.5 miles per gallon by 2025 and further restrict the tailpipe emissions blamed for global warming.(AP Photo/Don Ryan) less 
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Associated Press | Photo By Don Ryan
Fri, Jul 29, 2011 2:55 PM EDT