Hoping this isn't true but came from a Ford Rep at the NAIAS.
"SOURCE: FORD TO DISCONTINUE V8 MOTORS IN MUSTANG, F-150 AFTER 2017, WILL RUN 4-CYLINDER AND V6 ECOBOOST EXCLUSIVELY"
Source: Ford to discontinue V8 motors in Mustang, F-150 after 2017, will run 4-Cylinder and V6 EcoBoost exclusively | HorsepowerKings.com
Snip from article
Ford is definitely phasing out the V8 motor altogether”, he said – word for word. “CAFE and EPA are working very hard discreetly to to make sure of that. There is quite a bit going on at Ford that the public is in the dark about. The impression that I am getting is that Ford wants to continue it’s V8 program, but things have (rather recently) taken a new direction, presumably from CAFE/EPA pressure in mid to late 2013. Ford have invested quite a bit of money into the Coyote program over the years, and even had plans of going DI (Direct Injection). The future development budget for the 5.2L FPC motor has dwindled, and there is talk that this motor may continue it’s life exclusively in the form of sanctioned racing series, not on the street. The next big thing for Ford at this point is weight savings. They are trying to lighten these Mustangs to get high performance numbers out of the Ecoboost, and whether we like it or not, that is the (near) future. It’s not Ford’s fault, and you can thank the Gov’t for this – not the consumer”.