With cheap gas, America’s big MPG goals in trouble

In private meetings late last year, U.S. regulators and automakers staked out preliminary—and opposing—positions in a debate about the companies’ ability to boost fuel economy 50 percent to 54.5 miles per gallon by 2025. The manufacturers’ message was simple: Improvements to gasoline engines, including direct-injection and turbocharging, clearly won’t be enough to reach the target […]

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