Can't import one unless it's at least 25 years old though. Even if someone wanted to build something similar in the US, they probably wouldn't meet efficiency

Can't import one unless it's at least 25 years old though. Even if someone wanted to build something similar in the US, they probably wouldn't meet efficiency standards in the US because those are tied to the size of the vehicle (yes if you build a bigger vehicle, the mileage can be worse!). I think that change was made in response to the PT Cruiser[1], which was classified as a "Light Truck" to improve Chrysler's CAFE[2] metric. 1: https://en.wikipedia.org/wiki/Chrysler_PT_Cruiser https://en.wikipedia.org/wiki/Chrysler_PT_Cruiser 2: https://en.wikipedia.org/wiki/Corporate_average_fuel_economy https://en.wikipedia.org/wiki/Corporate_average_fuel_economy