Pages and pages and pages, and it all comes down to these initials: EPA & CAFE. The F-150 is not only the biggest selling truck, it is Ford's biggest selling vehicle. Unless the Obama era changes to CAFE standards are rolled back, it could imperil light truck sales for all manufacturers, hence the introduction of the small diesels. Better fuel mileage over a gas engine in pure driving application. More half tons are sold as fashion statements and the new family sedan than work trucks I'd venture to say.
