25 MPG combined may not seem earth-shattering, but for a four-door Jeep Wrangler with a torquey diesel engine and serious off-road hardware, it’s impressive. This isn’t a vehicle for hypermiling; it’s chosen for its unmatched capability and iconic design. The EcoDiesel engine allows Wrangler owners to enjoy ample power for challenging trails and respectable fuel economy for daily driving.

City and highway performance

The EPA estimates the 2021 Jeep Wrangler EcoDiesel at 22 MPG in the city and 29 MPG on the highway. These numbers reflect the compromises in a vehicle designed for off-road performance. The Wrangler’s aerodynamics are “challenging,” and its reliable four-wheel-drive system adds weight and rolling resistance. However, the diesel engine’s efficiency at lower RPMs helps mitigate these factors, resulting in city MPG that is surprisingly close to the highway figure. The benefit is apparent on longer trips, where the EcoDiesel shines compared to the gasoline powered Wranglers.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Jeep Wrangler 4dr EcoDiesel 4WD at $2,250. This figure is based on driving 15,000 miles per year and using national average fuel prices. Your actual fuel costs will vary depending on your driving habits, location, and current diesel prices. Someone who primarily uses their Wrangler for short trips around town will likely see a higher annual fuel cost, while someone who frequently embarks on long highway journeys might find their costs are lower.

Real-world expectations

While the EPA estimates provide a useful baseline, real-world fuel economy can differ considerably. Many Wrangler EcoDiesel owners report achieving MPG figures very close to the EPA estimates, especially on the highway. However, aggressive off-roading, the addition of larger tires, or carrying heavy loads will negatively impact fuel economy. The diesel engine’s responsiveness and torque can also tempt drivers into spirited acceleration, which will also take a toll on fuel efficiency. Like any vehicle, conscientious driving habits are key to maximizing MPG. Always keep in mind that you can view WRANGLER MPG across all years.

How it compares

The EcoDiesel Wrangler is different than its gasoline-powered siblings. The 2.0L turbocharged four-cylinder Wrangler, for example, is EPA-rated at 22 MPG combined. While the four-cylinder might offer a slightly lower entry price, the EcoDiesel provides significantly more torque and often delivers better real-world MPG, especially when towing or carrying heavy loads.

Comparing the Wrangler to other body-on-frame SUVs reveals further differences. The Toyota 4Runner, a popular competitor, achieves only 17 MPG combined, making the EcoDiesel Wrangler a more efficient choice. Even newer, more crossover-like SUVs like the Ford Bronco (20 MPG combined for the 2.3L EcoBoost) don’t match the Wrangler EcoDiesel’s fuel economy, despite having smaller engines, which contributes to lower weight and better aerodynamics. The Wrangler owner prioritizes capability and opens air driving, and accepts the associated MPG compromises. Looking at all Jeep fuel economy data shows you every MPG option in their current lineup.

Tips to maximize efficiency

Avoid excessive idling. The EcoDiesel engine, like all diesel engines, consumes more fuel when idling than a comparable gasoline engine. If you anticipate being stopped for more than a minute or two, it’s best to turn off the engine. This is especially easy with the Wrangler’s auto stop/start system.

Maintain proper tire pressure. The Wrangler’s off-road tires can lose pressure over time, increasing rolling resistance and reducing fuel economy. Check your tire pressure regularly and inflate your tires to the recommended level. Even a few PSI below the recommended pressure can impact MPG.

Drive smoothly and predictably. Avoid sudden acceleration and hard braking, as this wastes fuel. Anticipate traffic flow and maintain a steady speed whenever possible. The diesel engine’s abundant torque means you don’t need to push the engine hard to maintain momentum.

Minimize aerodynamic drag. Remove any unnecessary roof racks or cargo carriers when not in use. These accessories increase wind resistance and reduce fuel economy, especially at highway speeds. Even something as simple as removing a bulky spare tire cover can make a small difference.

Ensure proper maintenance. Regular oil changes and air filter replacements are critical for maintaining optimal engine performance and fuel economy. Follow the manufacturer’s recommended maintenance schedule to keep your EcoDiesel running efficiently.