The 2022 Jeep Gladiator Rubicon EcoDiesel 4WD 3.0L 6-cyl gets 24 MPG combined, which won’t win any awards for less gas, but it’s respectable considering what this vehicle is: a mid-size pickup truck with serious off-road capability, a removable top, and the undeniable charm of a Jeep. This isn’t about maximizing every last drop of fuel; it’s about maximizing adventure, and the EcoDiesel engine allows for plenty of that without completely emptying your wallet at the pump.

City and highway performance

The EPA estimates for the Gladiator Rubicon EcoDiesel break down to 21 MPG in the city and 27 MPG on the highway. These figures reflect the realities of driving a heavier vehicle with a focus on off-road capability. The city MPG illustrates the impact of stop-and-go traffic and the engine’s effort to move the Gladiator’s mass from a standstill. The highway MPG, while better, still showcases the aerodynamic challenges of a vehicle designed for rocky trails rather than wind tunnels. The eight-speed automatic transmission effectively keeps the engine in its optimal efficiency range at cruising speeds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Jeep Gladiator Rubicon EcoDiesel at $2,300. This figure is based on driving 15,000 miles per year, with a fuel price based on national averages, which will inevitably fluctuate. Expect to spend more if you primarily drive in the city, frequently tow, or enjoy using the Gladiator for its intended purpose: getting off the beaten path. Understanding this figure is critical for budgeting and comparing the long-term ownership costs against other potential choices.

Real-world expectations

While the EPA provides a standardized benchmark, your actual fuel economy will vary. Factors like driving style, tire pressure, cargo weight, and modifications like larger tires or aftermarket bumpers will influence the MPG you see in daily use. Gladiator owners also tend to be more enthusiastic drivers, and the temptation to explore the vehicle’s full potential can easily lead to lower fuel economy numbers. Regular maintenance, including oil changes and air filter replacements, plays an important role in maintaining optimal efficiency.

How it compares

The Gladiator EcoDiesel’s fuel economy stands in a unique position within the mid-size truck segment. The Toyota Tacoma, a popular choice, typically achieves around 20 MPG combined with its V6 engine. The Chevrolet Colorado and GMC Canyon with their gasoline V6 engines also hover in the low 20s for combined MPG. Even the four-cylinder versions of these trucks rarely exceed the Gladiator EcoDiesel’s numbers by a significant margin, especially when equipped with four-wheel drive. For those prioritizing fuel economy within the Jeep family, exploring all Jeep fuel economy data might be beneficial. However, for pickup-truck shoppers specifically, focusing on GLADIATOR MPG across all years can allow for more efficient research. Owners accept the Gladiator’s fuel economy because it offers a combination of diesel torque, off-road capability, and open-air fun that few other vehicles can match.

Tips to maximize efficiency

Maintain consistent tire pressure. The Gladiator Rubicon EcoDiesel often runs on larger, more aggressive tires, and ensuring they are properly inflated reduces rolling resistance. Check the tire pressure regularly, especially before long trips or off-road adventures, to optimize fuel economy and tire wear.

Drive conservatively. The EcoDiesel engine delivers plenty of low-end torque, so avoid aggressive acceleration. A smooth, steady driving style minimizes fuel consumption, especially in city driving. Anticipate traffic flow and avoid unnecessary braking to conserve momentum and reduce fuel waste.

Minimize idling. The diesel engine is most efficient when it’s moving. Avoid unnecessary idling, especially during warm-up periods. Modern diesel engines warm up quickly under load, so getting underway shortly after starting is typically the most efficient approach.

Service the air filter. A clean air filter ensures proper airflow to the engine, which is important for efficient combustion. Replace the air filter according to the manufacturer’s recommendations, or more frequently if you drive in dusty or off-road conditions.