17 MPG combined is the stark reality facing buyers of the 2021 Jeep Grand Cherokee 4WD with the 5.7L V8. This isn’t targeted at hypermilers; it’s the cost of admission for those who prioritize that classic Jeep blend of off-road capability, towing capacity, and V8 rumble. Buyers know exactly what they’re getting into: a reliable, traditional SUV that’s more about muscle and heritage than maximizing efficiency.

City and highway performance

The EPA estimates provide a clear picture of where this Grand Cherokee struggles and where it performs slightly better. The city rating of 14 MPG reflects the engine’s thirst during stop-and-go driving, exacerbated by the vehicle’s weight and four-wheel-drive system. On the open highway, the 22 MPG rating is more palatable, suggesting the eight-speed automatic transmission can stretch fuel further at steady speeds. But those figures are contingent on a light foot; aggressive acceleration will quickly erode any highway gains.

Annual fuel cost

Prepare to budget accordingly. The EPA estimates an annual fuel cost of $3,100 for this Grand Cherokee configuration. This figure is 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. So, if your driving habits differ significantly or fuel prices spike, your actual cost could be much higher. Owners should remember the sticker shock at the pump won’t be a one-time thing.

Real-world expectations

The EPA figures provide a benchmark, but real-world fuel economy often varies. Grand Cherokee owners who frequently tow, venture off-road, or live in hilly areas will almost certainly see lower numbers. Conversely, those who primarily use the vehicle for highway cruising might inch closer to the 22 MPG highway estimate. Driving style is also critical. The 5.7L V8 is responsive, but heavy throttle use will quickly diminish fuel efficiency. Anticipate spending time at the pump and develop a sense of what your specific driving habits cost.

How it compares

Compared to other SUVs in its class, the 2021 Grand Cherokee 4WD 5.7L V8 isn’t exactly a champion of efficiency. A comparable Ford Explorer with the 3.0L EcoBoost V6 achieves around 20 MPG combined. Even something larger, like a Chevy Tahoe with its 5.3L V8, can sometimes achieve similar numbers, hovering around 16-18 MPG, though in practice it too will drop. The reason to still buy the Jeep is for its specific blend of off-road prowess and traditional, rugged appeal, features that might outrank fuel economy on a buyer’s priority list. For some, that V8 rumble is more valuable than any MPG figure. Consider also that you can check GRAND MPG across all years to see if others have had a different experience.

Tips to maximize efficiency

While the 5.7L V8 isn’t designed for hypermiling, there are still steps you can take to improve fuel economy. Resist the urge to bury the accelerator pedal. The V8 offers plenty of torque even with moderate throttle inputs, so drive smoothly and avoid aggressive acceleration whenever possible. Let the automatic transmission do its job, and resist the urge to manually downshift unless absolutely necessary.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which directly impacts fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure listed on the doorjamb sticker. It’s a simple step that can make a noticeable difference over time.

Minimize idling time. Modern engines don’t need to warm up for extended periods, especially in moderate weather. Turn off the engine if you anticipate being stopped for more than a minute or two. Excessive idling wastes fuel and contributes to unnecessary emissions.

Consider your driving environment. City driving with frequent stops and starts is particularly hard on fuel economy. If possible, plan your routes to avoid congested areas and prioritize highway driving when practical. Highway driving allows the engine to operate at a more consistent and efficient speed.

Ultimately, if fuel economy is important, consider other models. But if capability and character are critical, knowing all Jeep fuel economy data and adjusting your driving habits can take some of the sting out of that $3,100 annual fuel bill.