Introduction: A Fuel Efficiency Showdown in the Midsize Truck Segment

The midsize pickup truck market has long been dominated by two very different contenders: the Jeep Gladiator and the Toyota Tacoma. While both vehicles are built to handle off-road trails and daily chores, they diverge significantly when it comes to fuel economy and overall efficiency. For buyers who plan to use their truck as a daily driver, frequent highway commuter, or long-distance overland rig, gasoline consumption becomes a critical factor. This analysis provides a deep, real-world look at how the Gladiator and Tacoma stack up at the pump—covering official EPA ratings, engine options, drivetrain configurations, and the many variables that can tilt the scales one way or the other.

Jeep Gladiator Fuel Economy: Breaking Down the Numbers

The Jeep Gladiator, introduced for the 2020 model year, combines the iconic Wrangler’s off-road DNA with a pickup bed. Its boxy, upright shape and heavier curb weight put it at a distinct aerodynamic and mass disadvantage compared to more streamlined rivals. Yet it remains a favorite for those who prioritize open-air driving and extreme trail capability over fuel thrift.

Engine and Drivetrain Options

The primary engine for most Gladiator trims is the 3.6-liter Pentastar V6, producing 285 horsepower and 260 lb-ft of torque. This engine can be paired with either a six-speed manual transmission or an eight-speed automatic. All Gladiators come with standard 4WD on Rubicon and Mojave trims, but Sport and Overland trims offer a 2WD option (rear-wheel drive) that can improve fuel economy slightly.

For a brief period (2021–2023), Jeep also offered a 3.0-liter EcoDiesel V6 in the Gladiator, which delivered significantly better highway fuel economy—up to 28 mpg highway according to EPA estimates. However, the diesel option was discontinued after 2023 due to low demand and emissions compliance costs. For this comparison, we focus on the gasoline V6, which remains the volume engine.

Official EPA Fuel Economy Ratings

The following numbers represent the most common Gladiator configurations (gasoline V6):

  • 2WD, 6-speed manual: 16 city / 23 highway / 19 combined
  • 2WD, 8-speed automatic: 17 city / 22 highway / 19 combined
  • 4WD, 6-speed manual: 15 city / 21 highway / 17 combined
  • 4WD, 8-speed automatic: 17 city / 22 highway / 19 combined

Notable is that the automatic transmission in 4WD configurations matches the 2WD automatic’s highway rating—a testament (oops, avoid that word — rephrase: a clear indication) to the efficient gearing of the eight-speed unit. However, city mpg remains disappointing, largely due to the Gladiator’s 4,500–5,100 lb curb weight and brick-like aerodynamics (drag coefficient around 0.51).

Real-World Gladiator MPG: What Owners See

On the road, Gladiator owners report combined fuel economy ranging from 16 to 19 mpg in mixed driving. Highway cruising at 65–70 mph can yield 20–22 mpg, but speeds above 75 mph often drop below 20 mpg. Towing a trailer (max 7,700 lbs) can halve those numbers, pulling fuel economy down to 10–12 mpg. Enthusiasts on forums like Jeep Gladiator Forum frequently share that the truck is “thirsty” but acceptable given its capability.

Toyota Tacoma Fuel Economy: A Closer Look

The Toyota Tacoma has been a midsize truck staple for decades, celebrated for its reliability, resale value, and off-road trim options. The third-generation Tacoma (2016–2023) offers two gasoline engines: a 2.7-liter four-cylinder and a 3.5-liter V6. The new fourth-generation Tacoma (2024+) introduces a turbocharged 2.4-liter four-cylinder, but the vast majority of used and current inventory still uses the older engines, so we focus on those for a fair comparison.

Engine Choices and Their Impact

The base 2.7-liter four-cylinder produces 159 hp and 180 lb-ft. It is an anemic but durable workhorse, primarily aimed at work truck fleets and budget buyers. With this engine, fuel economy is respectable. The 3.5-liter V6 (278 hp, 265 lb-ft) is the popular choice, offering better passing power and towing capability (up to 6,400 lbs). Both engines mate to either a six-speed automatic or a six-speed manual (V6 only).

Official EPA Fuel Economy Ratings

2.7L Four-Cylinder:

  • 2WD automatic: 19 city / 24 highway / 21 combined
  • 4WD automatic: 19 city / 22 highway / 20 combined

3.5L V6:

  • 2WD automatic: 18 city / 24 highway / 20 combined
  • 4WD automatic: 17 city / 22 highway / 19 combined
  • 4WD manual: 16 city / 21 highway / 18 combined

The Tacoma’s V6 numbers are very close to the Gladiator’s V6, but the four-cylinder gives the Tacoma a clear advantage in city driving and stop-and-go traffic. Importantly, the Tacoma is lighter (roughly 4,200–4,500 lbs depending on configuration) and has a slightly better drag coefficient (around 0.48), which helps at highway speeds.

Real-World Tacoma MPG: Owner Reports

On sites like Fuelly, owners log an average of 18–20 mpg combined for V6 4WD Tacomas and 20–22 mpg for four-cylinder 2WD models. Many owners report achieving 22–24 mpg on highway trips with gentle driving, but the V6 struggles to break 20 mpg in mixed suburban use. Like the Gladiator, towing reduces fuel economy significantly—expect 12–14 mpg towing a 5,000 lb load.

Head-to-Head Fuel Economy Comparison: The Detailed Breakdown

When placed side by side, the Toyota Tacoma holds a modest but consistent advantage in fuel efficiency over the Jeep Gladiator. The gap is most pronounced in city driving—especially when comparing the Tacoma’s four-cylinder against the Gladiator’s V6. On the highway, the difference shrinks to 1–3 mpg in favor of the Tacoma. Below is a summary of key comparison points:

  • City MPG (4WD V6): Tacoma 17 vs Gladiator 17 — essentially a tie. The Tacoma four-cylinder (19 city) beats the Gladiator handily.
  • Highway MPG (4WD V6): Tacoma 22 vs Gladiator 22 — equal. The Gladiator’s eight-speed automatic helps it stay competitive on the interstate.
  • Combined MPG (4WD V6): Tacoma 19 vs Gladiator 19 — tied. But the Tacoma four-cylinder achieves 20 combined, which is better than any Gladiator variant.
  • Fuel Tank Size: Gladiator holds 22 gallons; Tacoma holds 21.1 gallons. The Gladiator’s slightly larger tank partially offsets its thirst, giving a theoretical highway range of ~485 miles (22 mpg x 22 gal), versus Tacoma V6’s ~464 miles (22 mpg x 21.1 gal). In reality, the Tacoma often goes further each fill-up because drivers see better real-world economy.
  • Drivetrain Impact: Both trucks lose about 1–2 mpg when switching from 2WD to 4WD. The Gladiator’s manual transmission actually returns worse fuel economy than its automatic, which is unusual—blame the tall gearing and engine calibration.

Why the Gladiator Struggles to Match the Tacoma

The primary reasons for the Gladiator’s lower fuel economy are weight, aerodynamics, and powertrain tuning. The Gladiator is roughly 300–500 lbs heavier than a comparable Tacoma, and its Wrangler-derived front end creates significant drag. Additionally, the Pentastar V6 is tuned for lower-end torque rather than fuel efficiency, while the Tacoma’s V6 employs Atkinson-cycle technology (in the automatic version) to improve efficiency under light throttle. These engineering choices add up to a real-world disadvantage for Jeep.

Factors That Influence Fuel Efficiency in Midsize Trucks

Understanding the EPA numbers is just the start. Many variables can push your actual mpg up or down by 3–5 mpg. Here are the most impactful factors for both the Gladiator and Tacoma:

Weight and Payload

Every extra pound requires more fuel to move. A lightly loaded truck will always get better mpg. The Gladiator’s higher curb weight means it suffers more when carrying a full payload or towing. For daily commuting, removing unnecessary accessories (like heavy bumpers, roof racks, or oversized tires) can improve fuel economy noticeably.

Driving Style

Aggressive acceleration and high-speed cruising are enemies of efficiency. Both trucks exhibit a sharp drop in mpg above 65 mph due to aerodynamic drag. Using cruise control, avoiding jackrabbit starts, and maintaining steady speeds can yield an extra 2–3 mpg in either vehicle. Many Gladiator owners report that driving at 60 mph instead of 75 mph improves highway mpg from 18 to 22.

Maintenance and Tire Choice

Underinflated tires increase rolling resistance. Keeping tires at the recommended pressure (usually 35–38 psi) is critical. Also, switching from aggressive all-terrain tires to highway-terrain tires can improve fuel economy by 1–2 mpg. The Tacoma’s optional off-road packages often come with chunky tires that hurt mpg, but the Gladiator’s standard tires are already fairly aggressive.

Aftermarket Modifications

Lift kits, larger tires, and added weight from steel bumpers or winches all reduce fuel economy. The Tacoma is more tolerant of mild modifications, but the Gladiator’s already poor aerodynamics are further degraded by lift and larger tires. Owners should budget for a 5–10% decrease in mpg when upgrading.

Towing and Hauling

When towing near their maximum capacities, both trucks see fuel economy drop by 40–50%. The Gladiator’s heavier weight and less efficient drivetrain mean it often finishes slightly behind the Tacoma in towing mpg tests (Car and Driver recorded 12 mpg towing 4,000 lbs in the Gladiator vs 13 mpg in the Tacoma).

Which Truck Offers Better Value for Fuel Economy?

Fuel economy is just one piece of the total cost-of-ownership puzzle. To determine which truck provides better value, consider purchase price, resale value, maintenance costs, and fuel expenses over five years of ownership.

  • Purchase Price: A base 2WD Gladiator Sport starts around $39,000; a base 2WD Tacoma SR (four-cylinder) starts around $28,000. The Tacoma is significantly cheaper to buy.
  • Fuel Costs: Assuming 15,000 miles per year, $3.50/gallon, and combined mpg of 18 for the Gladiator V6 vs 20 for the Tacoma V6, the Gladiator costs about $2,917/year vs $2,625/year—a difference of $292 annually. Over five years, that’s $1,460 in extra fuel costs.
  • Resale Value: Both trucks hold value exceptionally well, but the Tacoma typically edges out the Gladiator in retained value (especially with the V6). A used Tacoma often sells for 80–85% of its new MSRP after three years, while the Gladiator holds around 75–80%.
  • Total Cost of Ownership: The Tacoma’s lower purchase price, lower fuel consumption, and higher resale value make it the more cost-efficient choice overall. The Gladiator only makes sense if you absolutely need its convertible roof, removable doors, or unmatched Wrangler-derived off-road capability.

Conclusion: Choose Based on Your Priorities

In the battle of fuel economy between the Jeep Gladiator and Toyota Tacoma, the Tacoma emerges as the clear winner for buyers who prioritize fuel efficiency and low running costs. Its four-cylinder engine provides excellent city fuel economy, while the V6 is competitive on the highway. The Gladiator, on the other hand, is the truck for those who value open-air freedom and extreme off-road prowess over mpg figures. Its fuel economy is adequate but unremarkable, and the diesel option (now discontinued) was the only way to make it truly efficient on the highway.

For daily commuting, long highway drives, or light off-road use, the Toyota Tacoma offers better overall value and lower fuel expenses. But if you dream of cruising with the top and doors off down a trail, and you’re willing to pay a bit more at the pump, the Jeep Gladiator remains a unique and rewarding vehicle. As always, test drive both, consider your typical driving profile, and weigh fuel economy against the features that matter most to you.

For more official fuel economy data, consult the EPA’s Fueleconomy.gov website. For real-world owner reports, visit Fuelly to see aggregated user averages. And for professional testing, review the comprehensive fuel economy tests by Car and Driver.