One reason for the product blitz is new federal rules mandating a near doubling of fleet average fuel economy by 2025.

WSJ: Electric Cars Try to Break Out of Niche

"We continue to drive our fleet average even lower, " Chrysler spokesman Nick Cappa said in a written response to the rankings.

FORBES: Vehicles

The feds recently finalized the Corporate Average Fuel Economy (CAFE) standards, which will require automakers to achieve a fleet average of 54.5 mpg by 2025.

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