The iconic Jeep Wrangler is a tough vehicle to make fuel-efficient.

Its separate frame and body add weight, and it has all the wind-cheating grace of a small municipal hospital.

The Wrangler SUV only gets redesigned every 10 years or so, so each new generation is a big deal to Jeep fans.

With tougher fuel-economy requirements and more stringent safety standards, the next generation has likely been a tougher design challenge than ever before.

We expect the new Wrangler to be revealed sometime over the next year.

It’s long been known that one of the routes the new Wrangler will take to comply with EPA fuel-economy rules is to offer a diesel engine as an option.

Fiat Chrysler said so itself, in fact, more than a year ago. Now, it appears that engine is already being tested in public.

The Jeep Wrangler Diesel is on schedule to debut as a late 2019-model-year vehicle, likely sometime early in 2019.

One of the site’s readers sent photos of a camouflaged 2019 Jeep Wrangler (the shape is much like the old one, surprise, surprise).

But as the story notes, the reader figured out that it was the diesel version under test—and even crawled under the vehicle to snap a photo of the tank for Diesel Emission Fluid.

That’s the substance that allows the latest diesels from all makers to stay within EPA limits on emissions of nitrogen oxides (NOx).

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Joel Stocksdale
Joel Stocksdale has more than a quarter century joined car industry and car news coverage encounter that he conveys to Green Auto Shop perusers. Over the thirteen years that he possessed a car business, he worked straightforwardly with each significant auto mark in the vehicle business and got comfortable with all makes and models of autos. His energy for autos drove him to put over the most recent twelve years in car news coverage where he conveys all that experience to his perusers as he expounds on the vehicle business and the most recent test autos he drives.