25 MPG combined isn’t going to win any hypermiling awards, but the 2018 Jeep Grand Cherokee 2WD with its 3.0L V6 EcoDiesel doesn’t aim to. It’s a respectable figure given the Grand Cherokee’s size, weight, and inherent ruggedness, and it’s this last element that defines why someone chooses this particular configuration. The buyers aren’t seeking maximum thrift. They’re after the blend of Jeep capability, diesel torque, and reasonably spacious two-row SUV practicality.

City and highway performance

The EPA estimates for this Grand Cherokee reflect a predictable spread. City driving is pegged at 22 MPG, reflecting the stop-and-go conditions that hamper fuel efficiency. The EcoDiesel’s torque helps here, minimizing the need for aggressive acceleration. On the open road, the Grand Cherokee shines, achieving a respectable 30 MPG. This number is largely thanks to the smooth-shifting 8-speed automatic transmission, which keeps the engine at its best performance at highway speeds. This makes it a capable and relatively efficient long-distance cruiser.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Jeep Grand Cherokee 2WD 3.0L V6 EcoDiesel at exactly $2,250. This figure is based on driving 15,000 miles per year and using the national average fuel price for diesel fuel when the testing was conducted. Individual fuel costs will vary depending on driving habits, location (fuel prices change), and how much you actually drive. For example, someone who only drives 10,000 miles annually will spend considerably less, while a driver covering 20,000 miles will see their fuel costs increase proportionally. But the $2,250 estimate gives a solid benchmark against which to compare other vehicles and to understand the potential ongoing cost of ownership.

Real-world expectations

While EPA estimates provide a useful benchmark, “your mileage may vary,” as the saying goes. Grand Cherokee owners often report real-world fuel economy that’s close to the official figures, but it’s important to be aware of the factors that can impact those numbers. Towing, aggressive driving, and even the use of accessories like roof racks can all decrease fuel efficiency. However, with a conscious effort to drive smoothly and maintain the vehicle properly, achieving numbers close to the EPA estimates is certainly possible.

How it compares

To see how the Grand Cherokee stacks up against the competition, consider the Toyota 4Runner. With its standard V6 engine, the 4Runner only manages 19 MPG combined, making the Grand Cherokee’s 25 MPG significantly more appealing for those prioritizing fuel efficiency. The Ford Edge, with its base EcoBoost engine, achieves a combined rating of 24 MPG, very close to the Grand Cherokee’s figure. However, the Edge lacks the Grand Cherokee’s off-road pedigree. Those who want to look at all Jeep fuel economy data will find that the Grand Cherokee EcoDiesel stands out as one of the brand’s more efficient offerings in the SUV segment. For example, the comparable gasoline-powered V6 Grand Cherokee is rated at 21 MPG combined. If you are comparing GRAND MPG across all years of production, the 2018 EcoDiesel stands out by offering the most fuel efficient version for that year.

Tips to maximize efficiency

One of the easiest ways to boost your Grand Cherokee’s fuel economy is to adopt smooth driving habits. Avoid aggressive acceleration and braking, and maintain a steady speed on the highway. The EcoDiesel engine delivers ample torque at lower RPMs, so there’s rarely a need to push the engine hard.

Tire pressure plays an important role in fuel efficiency. Check your tires regularly and inflate them to the recommended pressure listed on the driver’s side door jamb. Underinflated tires create more rolling resistance, which forces the engine to work harder and burn more fuel.

Minimize idling time. If you’re stopped for more than a minute or two, turn off the engine. Modern vehicles, including the Grand Cherokee, are designed to restart quickly and efficiently, so you won’t be causing any undue wear and tear on the starter. This is especially true in urban environments.

Regular maintenance is critical to maximizing fuel efficiency. Keep the engine properly tuned, change the air filter as recommended in the owner’s manual, and use the correct type of oil. A well-maintained engine runs more efficiently and consumes less fuel. The EcoDiesel engine requires specific oil formulations, so be sure to use the correct type.