The guys over at TFLTruck recently spotted a current-generation Jeep Wrangler fitted with light camouflage, a manufacture license plate, and an odd-looking exhaust tip. What does this cocktail mean? It’s hard to definitively say, but our hunch says this test mule is logging miles with the 3.0-liter EcoDiesel V-6.

Rumors have long been spreading that Jeep would incorporate the EcoDiesel into the Wrangler->ke425 at its next generational change. Well, that time has come and it appears Jeep’->ke40s R&D department is well underway with evaluations.

The addition of the V-6 EcoDiesel would give the Wrangler an incredible boost in fuel economy – perhaps by a full 10 mpg on the highway. The current Wrangler is rated at 21 mpg highway with its 3.6-liter gasoline V-6. Conversely, the Ram 1500 EcoDiesel pickup, which is slightly heavier than the current Wrangler, can achieve 29 mpg on the highway. If the next-generation Wrangler loses a decent amount of weight, it could potentially achieve 30 mpg highway. That’s a big deal.

Beyond the spy shots, TFLTruck spends time talking about their top 10 topics for the upcoming off-roader. They include all the fiercely debated rumors like roof designs, suspension set-ups, and of course powertrain rumors. I won’t spoil all the fun, so you’ll have to watch the video for the full details.

As always, check back with TopSpeed for the latest in automotive news.

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