Summary
The revised rule sets a fleet‑wide average of roughly 35 miles per gallon by 2031, down from the previous target of about 50 miles per gallon established under the prior administration.
Automakers argue that a stable standard is necessary for long‑term investment, product development and performance testing of new vehicle models.
States such as California and New York, along with environmental organizations, contend that the new rule overlooks the rise of electric vehicles and could increase gasoline consumption.