Every coming model year vehicle MPG requirements get much steeper, and soon there is also a CO2 per mile regulation.
https://humanevents.com/2022/06/22/new-mpg-rule-will-exacerbate-existing-car-shortage/sample quote
NHTSA’s new rule requires a massive 40 percent increase in mpg from now to 2026. Fuel efficiency must rise 8 percent in 2024 and 2025 model year automobiles, and 10 percent in 2026 model year automobiles, to a 49-mpg car and truck fleet average. Historically, the most manufacturers have been able to increase mpg year-over-year is about 3 percent. So, surging average mpg by a whopping 10 percent is a tall order.
Adding insult to injury, the Environmental Protection Agency (EPA) has separately set carbon dioxide (CO2) emission limits on automobile fleets.
By 2026, cars will have to produce an average of 132 grams of CO2 per mile (g/mile) and light trucks an average of 187 g/mile for a fleet average of 161 g/mile, a 28 percent decrease from 2022.
If vehicles do not meet this standard, EPA will not certify them for sale.
The challenge with this ruling is no cars with an internal combustion engine, that is, every automobile that runs on gasoline, currently emit CO2 at this extremely low level. The lowest-emitting car is the 2022 Toyota Prius Eco at 159 g/mile.
Trucks like the Ford F-150, Dodge Ram, and the Chevrolet Silverado, the three most popular automobiles in the country in terms of sales, emit 407 to 550 g/mile, depending on engine size.
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