The U.S. vehicle fleet hit a record for fuel efficiency in 2018 averaging 25.1 miles mpg in real-world driving as it rose 0.2 mpg, the EPA said. The fleet is also preliminarily anticipated to jump to 25.5 mpg for the 2019 model year.
The EPA and NHTSA are working to finalize rules to rollback Obama-era requirements through the 2026 model year. Officials hope to finalize the new rules by April 1 but are still working to address remaining issues.
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