25 MPG combined isn’t going to set the world on fire in 2015, but for the rear-wheel-drive Jeep Grand Cherokee with the 3.0L V6 diesel, it’s a good balance of capability and efficiency. This isn’t a compact crossover for running errands; it’s a mid-size SUV built for hauling, towing, and occasional off-pavement adventures. The buyers of this particular Grand Cherokee configuration are typically value-conscious individuals who need the versatility of a larger vehicle without truly terrible gas mileage. They prioritize comfort, reliability, and resale value over fuel savings. They might tow a small camper or boat on weekends, or simply appreciate the extra space for passengers and cargo.

City and highway performance

The EPA estimates you’ll see 22 MPG in the city and 30 MPG on the highway with this Grand Cherokee. The city figure reflects the engine’s need to work harder in stop-and-go traffic, and the Grand Cherokee’s inherent weight can’t be disguised.

However, the highway number is more respectable, thanks to the smooth-shifting 8-speed automatic transmission that allows the diesel engine to cruise comfortably at lower RPMs. This contributes to noise reduction and fuel savings on longer trips. That 30 MPG highway figure is a selling point for drivers who spend significant time on the open road.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,250 for the 2015 Jeep Grand Cherokee 2WD 3.0L diesel. This figure is based on driving 15,000 miles per year, using a national average fuel price. Diesel prices tend to fluctuate more than gasoline, so your actual cost could be higher or lower depending on your local fuel prices and driving habits. While $2,250 might seem high compared to a hybrid, it’s a reasonable figure within the context of a mid-size SUV with its capabilities.

Real-world expectations

While the EPA numbers provide a useful benchmark, real-world fuel economy can vary based on driving style, terrain, and the use of accessories like air conditioning or towing. Drivers with a heavy foot can expect to see lower numbers, especially in city driving.

However, those who adopt a more conservative driving style and prioritize smooth acceleration can likely achieve figures closer to, or even slightly better than, the EPA estimates on the highway. Regular maintenance, including proper tire inflation and timely oil changes, is essential for maintaining optimal fuel economy. Think of the EPA number as a suggestion, not a guarantee. See all Jeep fuel economy data to compare other models.

How it compares

The 2015 Grand Cherokee 2WD 3.0L diesel competes with other mid-size SUVs offering a mix of capability and reasonable fuel efficiency. For example, the Toyota 4Runner, while known for its off-road prowess, achieves only around 19 MPG combined with its V6 engine.

A similarly equipped Ford Explorer, with its gasoline V6, also hovers around the 20 MPG mark combined. Some older Mercedes-Benz ML350 BlueTEC models achieve similar fuel economy in the mid-20s, but maintenance costs can be substantially higher. From other model years, see GRAND MPG across all years.

The Grand Cherokee’s combination of towing capacity, spacious interior, and relatively efficient diesel engine makes it a good option for buyers who need a versatile vehicle without the guilt of excessive fuel consumption.

Tips to maximize efficiency

Anticipate traffic flow and avoid sudden acceleration and braking. The Grand Cherokee is a heavy vehicle, and every unnecessary burst of speed requires extra fuel to overcome its inertia. Smooth and gradual acceleration will significantly improve your fuel economy, especially in city driving. Let the diesel engine’s torque do the work.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly and inflate them to the recommended level, which can be found on a sticker inside the driver’s side doorjamb. This is important for longer highway journeys.

Avoid idling for extended periods. If you’re stopped for more than a minute or two, turn off the engine. A running engine consumes fuel even when the vehicle is stationary. The diesel engine, while efficient, still burns fuel while idling. It adds up over time.

Use cruise control on the highway. Cruise control helps you maintain a consistent speed, which minimizes unnecessary acceleration and braking. This is effective on flat stretches of highway. This Grand Cherokee’s eight-speed automatic works well with the cruise control to optimize fuel usage.

Limit cargo weight and aerodynamic drag. Remove any unnecessary items from the vehicle to reduce weight and improve fuel economy. Also, consider removing roof racks or cargo carriers when not in use, as they can significantly increase aerodynamic drag.