The all-new 3.0-liter Hurricane Twin-Turbo Inline six engine has all the makings to replace the Hemi on paper with its sheer power, and when it comes to efficiency as well. Officially, the U.S. Environmental Protection Agency (EPA) has just released its official fuel economy numbers for the 2022 Jeep Grand Wagoneer equipped with the engine. Since this is the first Stellantis vehicle fitted with this engine, many will be paying close attention to these numbers.
Jeep Grand Wagoneer Hurricane Twin-Turbo I6 MPG Rating
The Grand Wagoneer is only available in four-wheel-drive (4×4) in both the United States and Canada. Interestingly the EPA published numbers for both two-wheel-drive and 4×4. It’s also important to note that the Hurricane twin-turbo engine in the Grand Wagoneer is the high-output version, with the standard-output Hurricane coming to the 2023 Wagoneer with 420 horsepower and 468 pound-feet of torque.
The 2022 Jeep Grand Wagoneer with the Hurricane twin-turbo engine sees an official EPA fuel economy rating of 14 MPG in the city, 20 on the highway, and 17 combined for the Grand Wagoneer 4×4, while the 2WD model sees the same combined rating, despite having a 1 MPG improvement in both city and highway. We didn’t come up with the numbers.
The Hurricane Twin-Turbo delivers 510 horsepower and 500 lb-ft of torque, significantly improving over the 471 ponies and 455 lb-ft of torque rating of the standard 6.4-liter Hemi V8. And with the big 392 Hemi coming in at 13 MPG city, 18 MPG highway, and 15 MPG combined, the fuel economy is only marginally below the new straight-six Hurricane engine, which has to use forced induction and an Exhaust Gas Recovery system (EGR) to get the job done. The cast-iron pushrod V8 is/was all motor.
Like the Hemi, the Hurricane engine will require Premium 91 Octane fuel; with that in mind and today’s current numbers, there will still be around $4,350 spent annually on fuel for the inline-six engine. But if you can afford such a premium SUV, then money spent on filling it shouldn’t be of a concern, right?
The Hurricane twin-turbo I6 engine is a deep-skirt cast-aluminum block with a structural aluminum alloy oil pan. During manufacturing, the block is deck-plate honed to optimize the cylinder bore shape, which is meant to help improve fuel efficiency. Jeep has already started production of the 2022 Jeep Grand Wagoneer with the Hurricane Twin-Turbo, and it’s expected to begin arriving in dealerships by the end of this month.