Leadership2 publishers3 min readPublished
Trump's CAFE rollback cuts the projected 2031 fleet average to 34.9 mpg
NHTSA projects the Trump administration's final fuel economy rule will leave the 2031 fleet average at 34.9 mpg, down from 50.4 mpg under Biden-era rules. For automakers, the harder question is how long the lower target lasts, and a Kelley Blue Book editor gives it two to three years.
The Board Room · Leadership desk
What happened
- The Transportation Department says the rule cuts the average upfront cost of a new vehicle by $1,300 and gives automakers more choice over what they build.
- Since taking office, the administration has repealed fines for automakers that miss federal mileage standards and ended EV purchase credits of up to $7,500.
- NHTSA's final 2031 projection sits slightly above the roughly 34.5 mpg it projected for the rule last December.
- EVs were 6.5% of new vehicle sales in February, down from 7.4% for all of 2025, according to Edmunds.
- Sierra Club campaign director Katherine Garcia vowed the group would fight the rule, saying weaker standards would make driving more expensive.
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Why it matters
- decision Product committees have to choose this quarter whether to pull back electric programs for a rule one Kelley Blue Book editor expects to last only two to three years.
- constraint With mileage fines already gone, automakers can book little new compliance saving from the lower target, so its value to them is mainly as a planning signal.
- cost Drivers pay for lower efficiency at the pump as gas prices climb, and the upfront offset reaches them only if automakers cut sticker prices; CarEdge's Shefska expects them not to.
The board-deck version is short. Automakers get room to build more gasoline vehicles [3], and their main trade group welcomes it. "The standards finalized under the previous administration effectively required a switchover to electric vehicles that was out of step with market realities and customer demand," said John Bozzella, CEO of the Alliance for Automotive Innovation [7]. The Transportation Department puts the savings to Americans at $138 billion over five years [4].
Transportation Secretary Sean Duffy described a larger change. "Thanks to President Trump's leadership, we have finally ended the illegal mandate that forced automakers to produce more expensive electric vehicles that American families didn't want," he said [5]. ABC News reported that no federal policy has mandated that auto companies sell EVs [6].
The board-deck version leaves out how long the rule lasts. Sean Tucker, managing editor at Kelley Blue Book, said carmakers "can't move fast enough to design new cars for a regulation likely to last just two to three years" [8]. It is one editor's forecast, but it states the trade-off in front of product committees. This quarter's decision is whether to pull back an electric program and keep the money. If tighter targets return, the later consequence is restarting that program on a deadline the company did not choose.
The headline number also overstates how far compliance moves. The drop from 50.4 to 34.9 mpg is 15.5 mpg, or about 31 percent [1]. But automakers had already stopped facing fines for missing federal mileage standards [9]. I think the final rule mostly changes the direction of federal policy on paper, because the penalty for missing the old target was gone before Monday.
Neither report addresses supplier contracts or commercial fleet purchasing, so the rule's effect on parts makers and fleet buyers is not yet known.
Buyers now face a price gap on EVs and a rising price for fuel. The average EV cost $54,813 in August against $50,089 for the average new car, according to Kelley Blue Book [12]. That $4,724 premium [2] no longer has a federal purchase credit to offset it [9]. Gasoline averaged $4.48 a gallon on Monday, up from less than $3 earlier this year, as the war with Iran disrupts fuel supplies [13]. "Less fuel-efficient cars mean more gas burned, spending more at the pump and dirtier air in our communities," said Katherine Garcia, who directs the Sierra Club's Clean Transportation for All campaign [16].
Whether buyers ever see the $1,300 the department promises [3] is disputed. It is about 2.6 percent of the average new-car price [3]. Patrick Anderson, CEO of Anderson Economic Group, called the estimate "entirely achievable" [15]. Ray Shefska, co-founder of CarEdge, disagreed. "Automakers are not going to lower prices as long as they sell 15.6 million to 16.2 million new cars annually while their profit margins increase due to relaxed government fuel economy standards," he told CBS News [14]. When the 2024 standards took effect, NHTSA said lifetime fuel savings from efficient vehicles would more than offset their higher upfront cost [18].
What to watch
- Any legal challenge the Sierra Club or other groups file against the final rule, and how quickly a court acts on it.
- Automakers' next quarterly disclosures, for changes to announced EV program timing or gasoline model mix.
- Kelley Blue Book's monthly transaction prices, to see whether any of DOT's $1,300 saving shows up in what buyers pay.