The rear-wheel drive, high-output 3.0-liter I-6 equipped 2022 Grand Wagoneer is rated at 15 mpg city, 21 mpg highway, and 17 mpg combined, compared to the 6.4-liter’s 13 mpg city, 19 mpg highway, and 15 mpg combined, according to the fueleconomy.gov website.
If you upgrade to the all-wheel-drive 2022 Jeep Grand Wagoneer, the Hurricane’s efficiency drops to 14 mpg city, 20 mpg highway, and maintains 17 mpg combined. The all-wheel drive Grand Wagoneer with the V-8 gets 13 mpg city, 18 mpg highway, and maintains 15 mpg combined. All Grand Wagoneers come equipped with an eight-speed automatic transmission.
A measly 1-2 miles per gallon better here or there doesn’t sound like a lot, but remember that the new high-output version of the I-6 delivers 510 horsepower and 500 lb-ft of torque, compared to the standard 6.4-liter V-8’s output of 471 horsepower and 455 lb-ft of torque. As we can see, the new I-6 Hurricane engine delivers on its promise of improved fuel economy without jeopardizing performance. In fact, it’s quite an improvement in every regard, at least on paper so far; finding 2 mpg combined while also gaining 30 horsepower is quite an achievement.
We’ll have to wait for real-world testing to see if those fuel economy figures hold up, but right now, the EPA estimates an annual fuel cost savings of $500 if you select the Hurricane over the V-8, based on 15,000 annual miles driven at current fuel prices. Again, the new engine is a $2,000 premium on the regular-wheelbase models, so you’d have to keep the car more than four years to actually see any savings in that regard.
The Hurricane engine debuted earlier this year with both a high output and standard output configuration. The standard output engine’s EPA estimates haven’t been published yet (it’ll be standard on the Wagoneer L), and it hasn’t shown up in any Stellantis vehicles just yet either, though it’s likely coming very soon to the smaller Jeep Wagoneer which currently offers a standard 5.7-liter Hemi V-8 engine. It will also likely offer a similar, marginal improvement in fuel economy over the standard V-8, while also offering more power and performance.