15 MPG combined is less a fuel economy figure and more a cost of doing business for the 2019 Jeep Grand Cherokee SRT 4WD. The person in the market for a strong SUV with a naturally aspirated 6.4-liter Hemi V8 isn’t prioritizing trips to the pump. They prioritize the sound, the feel, and the sheer presence of a vehicle that can run a sub-five-second zero-to-sixty time while hauling the kids and a weekend’s worth of gear. For this buyer, fuel economy is simply a tax on the privilege of driving something this powerful and capable.

City and highway performance

The EPA numbers for the Grand Cherokee SRT break down to 13 MPG in the city and 19 MPG on the highway. The city figure reflects the realities of stop-and-go traffic and the engine’s eagerness to use all of its 475 horsepower at the slightest prod of the accelerator.

The highway number is perhaps a bit more forgiving, assuming a constant speed and minimal heavy acceleration. This spread highlights the impact of driving style on the SRT’s fuel consumption. Drive it gently, and you might approach the EPA’s highway estimate. Drive it like it’s meant to be driven, and you’ll be closer to single digits in both scenarios.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2019 Jeep Grand Cherokee SRT is a hefty $3,850. This figure is calculated based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. It’s a significant expense, and one that prospective buyers should carefully consider. The $3,850 assumes a relatively restrained driving style, which, admittedly, is not the SRT’s natural habitat, and it’s a cost that may be higher if you enjoy the engine’s performance potential during every drive.

Real-world expectations

Forget the EPA numbers, real-world fuel economy for most Grand Cherokee SRT owners will likely be lower. Aggressive driving, frequent use of the launch control feature, and the simple allure of the Hemi’s soundtrack will lower the average MPG. Owners reporting their fuel economy on sites like Fuelly.com suggest that a combined average of 12-14 MPG is more realistic, especially for those who live in hilly areas or frequently encounter stop-and-go traffic. The GRAND MPG across all years will confirm that the SRT sits at the bottom of the range. This isn’t necessarily a surprise, but it’s important to temper expectations based on real-world driving habits.

How it compares

In the world of performance SUVs, the Grand Cherokee SRT’s fuel economy isn’t particularly egregious, but it’s certainly not a leader. The BMW X5 M, with its twin-turbo V8, delivers similar performance but manages around 16 MPG combined. The Mercedes-AMG GLE 63 S Coupe offers comparable power and luxury, but also lands in the 15-17 MPG range depending on driving style. Even within Jeep’s own lineup, lower trims of the Grand Cherokee with the V6 engine offer significantly better fuel economy, achieving upwards of 22 MPG combined. Of course, those models lack the SRT’s raw power and track-ready capabilities; that’s the entire point for the SRT customer. See all Jeep fuel economy data for a wider overview.

Tips to maximize efficiency

The first tip is the hardest to follow: resist the urge to bury your right foot into the accelerator at every opportunity. The 6.4-liter Hemi is incredibly responsive, but that responsiveness comes at a cost. Gentle acceleration and maintaining a steady speed will significantly improve fuel economy, even if it means sacrificing some of the driving fun.

Tire pressure plays a role, especially on a vehicle as heavy as the Grand Cherokee SRT. Ensure that your tires are properly inflated to the recommended pressure, which can be found on the driver’s side doorjamb. Under-inflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel.

Avoid extended idling, especially when the engine is cold. Modern engines warm up quickly, and letting the engine idle for several minutes is simply wasting fuel. If you know you’ll be stopped for more than a minute or two, turn off the engine.

Plan your trips strategically. Combining errands into a single trip minimizes the number of cold starts, which are particularly demanding on fuel consumption. Also, avoid peak traffic times whenever possible to reduce stop-and-go driving, which is detrimental to fuel economy.