After the 6.7L Scorpion Motor was introduced in late 2010, it was hailed throughout the 2011 model year as an all-new and revolutionary diesel. While it was—and still is—an impressive engine, even with all the power of Ford behind the development, a few bugs needed to be worked out.
One of these bugs was an unfortunate leaking of oil from the new engine’s space-age composite oil pan. These oil pans had a new ¼-turn drain plug for the main sump, and experience showed that after a few oil changes, the pans began to leak. The result was nasty oil spots, whenever and wherever you parked your truck. Not cool—and quite messy—to say the least.
Ford engineers soon solved the problem on later model 6.7L engines, but, unfortunately, Ford never used a recall to fix the leak on those early engines.
Read more at: https://www.dieselworldmag.com/ford/stop-the-drip-early-ford-6-7l-oil-pan-upgrade/