JLWranglerForums, the same folks who broke pricing on the 2020 Jeep Wrangler range, got the scoop on pricing for the 3.0-liter EcoDiesel V6 option. The third-generation oil-burner will be a $4,000 option — $995 less than on the 2020 Ram 1500 — but will require the beefier 8HP75 eight-speed automatic that adds another $2,000. The diesel won't be offered with Jeep's six-speed manual. The pricing puts around $3,250 between the EcoDiesel and the 3.6-liter Pentastar V6 with an automatic, depending on which trim gets chosen, as Jeep reworked the gas engine price mix to make the 2.0-liter four-cylinder more attractive on some trims.
To recap, the six-pot diesel produces 260 horsepower and 442 pound-feet of torque, and drinks from an 18.3-gallon tank. That tank size is just a half-gallon larger than the reservoir on the two-door gas-powered Wranglers, 3.5 gallons smaller than the gas-powered four-door tank. The fuel issue is why the EcoDiesel won't be offered on two-door Wranglers. Tank size is reduced compared to the gasoline-powered four-doors because of the DEF (diesel exhaust fluid) tank, a Jeep spokesperson telling Trucks.com "that adding the diesel engine and DEF tank to the two-door model would have required a fuel tank that was too small for customer needs."
Diesel Wranglers get Dana D44 axles front and back, and a 3.73 axle ratio on all trims. Tow rating and EPA fuel economy numbers haven't been released, but rumors suggest an estimated 30 miles per gallon on the highway.