“The F-250 will continue to be made with steel.
Heavier pickups are exempt from the gas mileage rule.”
I’m not disputing you, but do you have a link to the actual rule. I’ve searched and searched, and it seems to be some closely-guarded national secret.
I stopped by the local Ford dealer here and asked about the new truck. The mgr said it was likely to be a 2013 or could be a 2014. The 250 diesel will have steel body parts but is not exempt from the urea requirement for exhaust treatment. Sorry, I can’t quote the regs...