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54.5 mpg

The new fuel efficiency standard that all new cars must meet by 2025. The Obama administration had already increased the standard (for the first time since 1985) to 35.5 mpg in 2010.

The new fuel efficiency standard that all new cars must meet by 2025. The Obama administration had already increased the standard (for the first time since 1985) to 35.5 mpg in 2010.

Caroline Cournoyer is GOVERNING's senior web editor.