The average car purchased in 2023 emits higher levels of carbon dioxide (CO₂) than its 2013 equivalent. This is due to the large proportion of SUVs in the mix, which tend to be bigger and heavier.
Body in frame is an older way of making cars but it's far easier/cheaper to make thos heavy duty and modular (e.g. an f250 can be a pickup, tow truck, ambulance, dump truck...)
Unibody is more modern.
Most people can live with a unibody truck (Maverick,Ridgeline,Colorado).
I don't thing there's causation between unibody and body on frame as far as fuel consumption is concerned.
We'd need a mechanism that incentives smaller vehicles without impacting the services relying on the heavy duty vehicles...
A Maverick starting at like $24k and an f150 at $35k isn't enough...
Right, CAFE is heavily influenced by footprint (as in actual wheelbase square footage)
So if unibody “SUVs” are being used to raise the average of the “truck fleet”, I’m saying, change the system so they are bringing down the average of the “cars” segment.