Automakers and their suppliers are racing to develop technologies to meet strict new CAFE standards.
The rules will require companies to reach a fleet average of 35 miles per gallon, roughly, by 2017, and an eye-popping 54.5 (roughly) miles per gallon, by 2025.
But despite all the stories you've heard about electric cars powered by advanced lithium-ion batteries, chances are, you won't be owning one by 2017 - and probably not by 2025, either.
Electric cars will be just too impractical and expensive for most people in the near future.
Not your grandfather's ICE
Instead, if you buy a new car in the next five years, it's more likely to be powered by that old standby - the internal combustion engine (ICE).