CAFE should just differentiate by unibody and body/frame.
Make unibody have a high requirement.
You want a truck? You can have a truck.
And get rid of paying your way out of your mileage requirement. Or at least raise the rate astronomically.
2013 was just 3 days ago
World or US?
I imagine the world, many new cars sold in europe are also suv's
I wonder how motorcycles have fared? Motorcycle engine emissions seem to work different than car emissions. One thing I see a lot of is engines that were designed in the 80's or 90's (or 40's, if it's the right Royal Enfield) and are still sold now basically unmodified. You can buy a 2023 Suzuki DR650 right now today, and it will still have an air cooled engine with a carburetor on it.
But tightening emissions regulations have started to push out some of these engines. There probably won't be a 2024 DR650. The air-cooled Sportsters can't be sold in the EU now, and it won't be long before they're gone in the US.
I went from a 2009 Suzuki with the most simple of engines to a 2023 Harley with fuel injection, and overhead cams with variable valve timing. It has got to be a cleaner running engine, but I wonder how it compares to cars?
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