It's also the "footprint" model of fuel economy for CAFE. The required MPG for a truck is based on the area of the rectangle made by the wheels. This means th

It's also the "footprint" model of fuel economy for CAFE. The required MPG for a truck is based on the area of the rectangle made by the wheels. This means that for 2021, a larger F-150 is expected to get 25mpg, but something like the old Chevy S-10 would be expected to get 41.8mpg. [1] The automakers have determined that this is not practically achievable, and so you can't buy a truck like the old S-10 or a pre-Tacoma Toyota pickup anymore. [1] https://en.wikipedia.org/wiki/Corporate_average_fuel_economy#Agreed_standards_by_model_year,_2012–2025 https://en.wikipedia.org/wiki/Corporate_average_fuel_economy...