From Corey Simone at Jp Magazine:
The exciting news for the next generation Jeep Wrangler just keeps on coming. We have confirmed that the JL platform Wrangler will be available with a 3.0L EcoDiesel engine. It has been rumored for some time that the United States would finally get a diesel powered Wrangler that fans had been wanting for years. Power numbers haven’t been confirmed but if they are anything close to the Ram 1500, hold on tight. Aside from having enough torque to punish tires, the mileage from this redesigned and lighter Jeep should be well over 30 MPG.