23 MPG combined isn’t going to win any fuel economy awards, but for the 2022 Jeep Wrangler Rubicon 4-door EcoDiesel, it’s a perfectly acceptable trade-off for unparalleled off-road capability and a unique driving experience. Buyers considering this specific Wrangler configuration aren’t prioritizing fuel economy above all else; they want a highly capable vehicle that can crawl over rocks, ford streams, and then cruise comfortably (relatively speaking) on the pavement afterwards. For this type of buyer, 23 MPG with a diesel engine is a reasonable compromise for its strong torque and extended range.

City and highway performance

The EPA estimates for the Wrangler EcoDiesel are 21 MPG in the city and 26 MPG on the highway. The city rating is noteworthy because the Wrangler’s inherent design, upright windshield, knobby tires, and considerable weight, aren’t conducive to stop-and-go efficiency. The highway rating benefits from the diesel engine’s relaxed cruising nature and the 8-speed automatic transmission’s ability to keep the engine in its sweet spot. While the highway MPG isn’t stellar either, the diesel’s higher energy density means you’ll still cover more ground on a single tank compared to the gasoline-powered Wranglers.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Jeep Wrangler Rubicon 4-door EcoDiesel at $2,400. This figure is based on driving 15,000 miles per year and using national average fuel prices. Of course, individual fuel costs will vary based on driving habits, local fuel prices, and the actual number of miles driven annually. It’s important to remember that diesel fuel prices can fluctuate significantly compared to gasoline, so while the MPG figure is a factor, the total cost can vary. Drivers looking at WRANGLER MPG across all years should keep this in mind.

Real-world expectations

While the EPA provides a standardized testing methodology, real-world fuel economy can often differ. Wrangler owners, particularly those with the Rubicon trim, often modify their vehicles with larger tires, lift kits, and additional accessories. These modifications invariably impact fuel economy, often reducing MPG figures. Aggressive driving, frequent off-roading, and even just keeping it in four-wheel-drive on pavement will noticeably reduce efficiency. It’s realistic to expect that, depending on driving style and modifications, the real-world MPG could fall a few miles per gallon below the EPA estimates.

How it compares

The EcoDiesel offers a unique engine choice compared to other Wranglers. The gasoline-powered 2.0L turbo 4-cylinder Wrangler achieves a combined 22 MPG, only slightly less than the diesel. However, the diesel offers significantly more low-end torque, which is crucial for off-roading. The V6 gasoline version of the Wrangler returns around 20 MPG combined, making the EcoDiesel the most fuel-efficient engine option in the Wrangler lineup. Comparing it to other body-on-frame SUVs, the Toyota 4Runner with its 4.0L V6 manages around 17 MPG combined, highlighting the Wrangler EcoDiesel’s relative efficiency in this segment. For buyers who truly prioritize fuel efficiency, the Jeep Grand Cherokee 4xe plug-in hybrid offers an alternative within the Jeep family, delivering a significantly higher MPGe (miles per gallon equivalent) when using its electric motor; reviewing all Jeep fuel economy data is advisable for these buyers.

Tips to maximize efficiency

Given the Jeep Wrangler EcoDiesel’s inherent design and intended use, focusing on smooth and steady driving will yield the most significant gains in fuel economy. Avoid aggressive acceleration and braking, particularly in city driving, and anticipate traffic flow to maintain a consistent speed. The diesel engine is most efficient when operating at lower RPMs, so let the 8-speed automatic transmission do its work and keep the engine in its optimal range.

Tire pressure plays a critical role in fuel efficiency. Ensure your tires are properly inflated to the recommended pressure listed on the doorjamb sticker. Underinflated tires increase rolling resistance, which reduces fuel economy. Given that many Rubicon owners frequently air down their tires for off-road use, remember to reinflate them to the correct pressure before returning to the pavement.

Minimize unnecessary weight and aerodynamic drag. Remove any roof racks or cargo carriers when not in use, as they significantly impact fuel economy, primarily at highway speeds. Excessive weight in the vehicle also contributes to lower MPG, so remove any unnecessary items from the cargo area.

Regular maintenance is essential for optimal fuel efficiency. Ensure that the engine air filter is clean, as a clogged filter restricts airflow and reduces engine performance. Follow the manufacturer’s recommended maintenance schedule for oil changes and other services to keep the engine running smoothly and efficiently.

Consider using cruise control on the highway to maintain a consistent speed. Cruise control helps prevent fluctuations in throttle input, which can lead to wasted fuel. However, be mindful of the road conditions and traffic flow, as cruise control may not always be the most efficient option in hilly terrain or heavy traffic.