The NHTSA proposed last August to increase the corporate average fuel economy (CAFE) requirements by 8% annually for model years 2024 to 2026.
The NHTSA said those proposed rules would reduce consumers’ fuel costs by $140 billion for new vehicles sold in 2030 and by $470 billion in 2050, and increase estimated fleet average mileage by 12 miles per gallon (5.1 kilometers per liter) by 2026, relative to 2021
U.S. law requires 18 months notice, so final NHTSA rules must be signed by March 31 to take effect for 2024 models, which debut in September 2023.
Under Trump, the administration in March 2020 reversed fuel economy standards that had been set under his predecessor Barack Obama to require only a 1.5% annual increase in efficiency through 2026. Obama had required 5% annual increases .
