The new truck only has to get 2 mpg more than the old one. I don’t see anything about mini trucks at all.
A new half ton full size from Ford, GM, or Dodge is bound to get 2 mpg more than anything that is old enough to be a clunker trade in.
Over 8500 gvw there’s no mileage consideration at all, only older than 2001.
Apparently you haven’t actually tried to use this program. I’m talking about reality, not theory. No offense, but the reality is far different from the information presented on any website.