15 MPG combined. That’s the reality for the 2024 Jeep Grand Wagoneer 4WD with its 6.4L V8. It’s a number that might make some buyers balk, but for the Grand Wagoneer, it’s almost beside the point. This isn’t a vehicle purchased for its frugality; it’s bought for its large size, its luxurious appointments, and its commanding presence. Fuel efficiency is less important than the capability, comfort, and prestige that this large SUV delivers. The Grand Wagoneer buyer needs to haul a large family, tow a boat, or simply project a certain image, and they’re willing to pay the price at the pump to do it.

City and highway performance

Driving a Grand Wagoneer is an exercise in managing mass. The 13 MPG city rating reflects the strain of repeatedly accelerating its substantial weight from a standstill. Stop-and-go traffic is the enemy, constantly demanding bursts of power from the 6.4L V8. The 18 MPG highway figure is more palatable, and more easily achievable, but still trails far behind smaller, more streamlined SUVs. On the open road, the engine settles into a more relaxed state, and the eight-speed automatic transmission helps optimize for efficiency, but the aerodynamic challenges of pushing such a large vehicle through the air are undeniable.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2024 Jeep Grand Wagoneer 4WD 6.4L comes in at exactly $3,850. This calculation 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 at the time of the calculation. It’s a hefty sum, and one that owners should realistically expect to exceed, especially if they frequently tow, drive aggressively, or primarily operate in urban environments. This figure represents a serious and ongoing expense associated with owning this vehicle.

Real-world expectations

While the EPA numbers provide a baseline, real-world fuel economy can vary significantly based on individual driving habits and conditions. Aggressive acceleration, frequent short trips, towing, and even tire pressure can all impact the MPG you ultimately achieve. Owners who live in hilly areas or face regular traffic congestion should anticipate falling short of the EPA estimates. Conversely, those who primarily use their Grand Wagoneer for long highway cruises and practice smooth driving techniques may see figures closer to the 18 MPG highway rating. It is rare to see better than the EPA test results.

How it compares

The Grand Wagoneer isn’t alone in the full-size luxury SUV segment, but its fuel economy distinctly lags some of its competitors. The Cadillac Escalade with the 6.2L V8 manages a slightly better 16 MPG combined. Even a Lincoln Navigator with its twin-turbo V6 achieves 17 MPG combined. For buyers considering something different, a Range Rover with a mild-hybrid inline-6 engine boasts a significantly better 20 MPG combined. While capability and image certainly matter, the Grand Wagoneer’s fuel consumption can be a sticking point, especially when other large SUVs offer similar levels of luxury and utility with greater efficiency. For a broader perspective, you can see all Jeep fuel economy data.

Tips to maximize efficiency

Despite the Grand Wagoneer’s inherent thirst, there are a few strategies that can help squeeze out every possible mile per gallon. Resist the temptation to floor the accelerator at every opportunity. That 6.4L V8 is responsive, but each hard launch drains the fuel tank quickly. Instead, practice smooth, gradual acceleration to minimize fuel consumption. The GRAND MPG across all years isn’t going to suddenly jump up, but consistent driving habits add up.

Tire pressure plays an important role in fuel efficiency. Ensure that your tires are properly inflated to the manufacturer’s recommended pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly, especially during temperature fluctuations.

Minimize idling. Letting the engine idle for extended periods wastes fuel unnecessarily. If you’re stopped for more than a minute or two, switch off the engine. The Grand Wagoneer’s engine is designed to restart quickly and smoothly, so you won’t sacrifice convenience for fuel savings.

Consider carefully any roof racks/boxes. These may be necessary for the family’s gear, but greatly reduce the aerodynamics of this brick-shaped vehicle. Remove such things if you don’t need them, or use them only when the family is on a trip that requires the extra cargo capacity.