Here’s the Trump admin’s pathetic new fuel efficiency rule for 2026

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If proof were needed that the Trump administration never met an environmental regulation it didn't want to eviscerate, on Tuesday morning the Environmental Protection Agency and the National Highway Traffic Safety Administration published final fuel efficiency rules for new passenger cars and light trucks for model years 2021 through 2026. As has been widely anticipated, the EPA and NHTSA have gutted plans established in 2012 to make the nation's fleet of vehicles more fuel-efficient.

Under the old rules, automakers had to get their fleets to an average of 46.7mpg (5l/100km) by MY2025. As of today, even that not-very-ambitious target is toast. Instead, the US government is only requiring the industry to achieve an average of 40.4mpg (5.8l/100km) by MY2026. Fleet-wide CO₂ targets have been similarly watered down; by that same model year, the US passenger vehicle and light truck fleet must meet an average of 199g CO₂/mile (124g/km). By contrast, new European Union rules that went into effect this year require EU fleet averages to drop below 153g/mile (95g/km), with massive fines in store for automakers that fail.

As continues to be the case, the rules are based on the footprint of a vehicle, with large trucks and SUVs being held to an even weaker standard. As long as a MY2026 pickup or SUV can meet 34.1mpg (6.9l/100km) and emit no more than 240g/mile (150g/km) of carbon dioxide, that's enough to satisfy the new regulations.

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