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2020 Jeep Wrangler EcoDiesel Is Officially the Most Fuel-Efficient Wrangler

jeep wrangler unlimited eco diesel 2020 22 blue  exterior  profile jpg 2020 Jeep Wrangler Unlimited Rubicon EcoDiesel | Cars.com photo by Brian Wong

Jeep’s 3.0-liter EcoDiesel V-6 engine adds weight and expense to the Wrangler — it’s 400 pounds and $4,000 more — but our time behind the wheel has been largely positive. The diesel engine’s extra torque (260 horsepower, 442 pounds-feet) and intelligent throttle mapping make the diesel-powered Wrangler just as capable off-road as its gasoline siblings. It also improves the on-road experience, and after roughly 200 miles with one example in November, we observed higher mileage than the EPA highway estimates for either of the Wrangler’s other engines: a 3.6-liter V-6 or turbocharged 2.0-liter four-cylinder.

But we didn’t know where EPA estimates for the EcoDiesel would land. Until now.

Related: 2020 Jeep Wrangler EcoDiesel: Real-World Fuel Economy

The EPA rates the EcoDiesel Wrangler Unlimited — the four-door version of the Wrangler — at 22/29/25 mpg city/highway/combined. The combined rating is slightly lower than what we observed in our own real-world test. Of course, the EPA figures are estimates, and real-world results will vary depending on things like driving style and weather. It’s also likely fuel economy will change with the almost inevitable addition of bigger tires.

For comparison’s sake, the diesel Wrangler beats EPA combined estimates for the Wrangler’s 3.6-liter (19-20 mpg, depending on specifics) or turbo 2.0-liter (21-23 mpg) engines. You’ll have to reconcile that with the fact that diesel fuel costs 17% more nationwide, per AAA, than the regular gasoline recommended for the 3.6-liter. The turbo 2.0-liter can also run on regular, but it recommends premium (currently 5% more than diesel) for best performance.

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EPA ratings for the EcoDiesel Wrangler are significantly higher than the four-wheel-drive 2020 Toyota 4Runner, 16/19/17 mpg, and even the diesel-powered 2020 Chevrolet Colorado ZR2,  18/22/19 mpg. EPA ratings for the upcoming Land Rover Defender, a potential Wrangler competitor, have yet to be published.

Cars.com’s Editorial department is your source for automotive news and reviews. In line with Cars.com’s long-standing ethics policy, editors and reviewers don’t accept gifts or free trips from automakers. The Editorial department is independent of Cars.com’s advertising, sales and sponsored content departments.

Photo of Brian Normile
Road Test Editor Brian Normile joined the automotive industry and Cars.com in 2013, and he became part of the Editorial staff in 2014. Brian spent his childhood devouring every car magazine he got his hands on — not literally, eventually — and now reviews and tests vehicles to help consumers make informed choices. Someday, Brian hopes to learn what to do with his hands when he’s reviewing a car on camera. He would daily-drive an Alfa Romeo 4C if he could. Email Brian Normile

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