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U.S. Won’t Extend Comment Period for New Fuel Economy Rules

Carmakers won’t get extra time to submit arguments against the feasibility of next-stage U.S. fuel economy standards.
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Carmakers won’t get extra time to submit arguments against the feasibility of next-stage U.S. fuel economy standards.

Comments about the regulation, which would push the country’s average fleet fuel economy to 54.5 mpg by 2025, are due by late September. Carmakers say they need until at least the end of November to digest and respond to the government's 1,200-page report justifying the standards.

The analysis issued in July by the Environmental Protection Agency and National Highway Traffic Safety Administration claims the industry has the technology necessary to meet the regulation—and with very little need to rely on electric or hybrid powertrains. The report says benefits in fuel savings and reduced greenhouse gas emissions will offset the roughly $1,000 cost per vehicle to meet the standard.

But carmakers say the agencies’ math needs updating. Regulators have assumed fuel-efficient cars would account for 67% of U.S. new-car sales by 2025. So far this year cheap fuel prices have boosted sales of less-efficient trucks to nearly 56%, and the ratio is climbing.

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