Listed as JFC1-3.0-966, the important info is in the middle digits. The "3.0" identifies the engine's displacement. That doesn't confirm a diesel F-150, but the sticker is a sign that this truck has a 3.0-liter engine under its hood, which is a common displacement for oil-burning engines.
It could be the diesel used in some Jaguar Land Rover vehicles. Ford owned the British company when the "Lion" TdV6 was in development. While that does make some sense for the F-150, it's not a sure thing. This is a 3.0-liter engine, but it's not necessarily the same engine JLR is using in the Range Rover.
Our spies also report there's a distinct diesel clatter coming from under the hood and out the venturi-style exhaust pipe. It's not the first time we've heard such a report – in fact, you can hear the diesel F-150 chugging at idle right here.
These images also appear to shut down the notion the F-150 will use the Transit's 3.2-liter, five-cylinder diesel engine. That's good news, since the diesel Transit only pumps out 185 horsepower and 350 pound-feet of torque – both figures are far below the Ram 1500 EcoDiesel's 240 hp and 420 lb-ft of torque.
Our spies are pointing to a late 2016 debut for the F-150 diesel, which would likely make it a 2017 model rather than a 2018 model. If that were the case – and here's where we're getting skeptical – that'd mean the diesel-powered F-Series could debut before the truck's mid-cycle refresh.