2021 Jeep Gladiator EcoDiesel 4WDFuel Economy & MPG Ratings
Trim Comparison
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 8-spd | Diesel Diesel | 22 | 28 | 24 | $3,500 |
Based on gasoline at $3.67/gal, 15,000 miles/year
vs. average new vehicle
Environment
- CO₂ Tailpipe Emissions
- 423 g/mile
- Annual Petroleum Consumption
- 14.9 barrels
Specifications
- Engine
- 3L 6-cyl
- Transmission
- 8-speed Automatic
- Drivetrain
- 4WD
- Body Style
- Pickup Truck
- GVWR
- Class 2-3 (6,001–10,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 3L, 6-cylinder
- Efficiency Tech
- Auto Start-Stop
- Fuel Type
- Diesel
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $2,806/yr | — |
| California | $5.957/gal | $3,723/yrHIGHEST | +$917 |
| Texas | $3.888/gal | $2,430/yrLOWEST | $-376 |
| Florida | $4.136/gal | $2,585/yr | $-221 |
| New York | $4.522/gal | $2,826/yr | +$20 |
| Ohio | $4.510/gal | $2,819/yr | +$13 |
| Washington | $5.591/gal | $3,494/yr | +$688 |
| Colorado | $4.618/gal | $2,886/yr | +$80 |
| Minnesota | $4.344/gal | $2,715/yr | $-91 |
| Massachusetts | $4.448/gal | $2,780/yr | $-26 |
Calculated at 15,000 miles/year (EPA standard assumption) using 24 MPG combined. Regular gasoline prices. Actual costs vary.
NHTSA Safety Ratings
Source: NHTSA (nhtsa.gov)Crash Test Scores
| Front Crash — Overall | |
| Front Crash — Driver Side | |
| Front Crash — Passenger Side | |
| Rollover | |
| Rollover Probability | 26.7% |
Safety Equipment
Recall History7
Source: NHTSAOwner-Reported Problems268 complaints
Source: NHTSANHTSA has received 268 owner complaints for the 2021 Jeep Gladiator EcoDiesel 4WD. Top reported issues include steering, power train and engine. The data below is sourced from consumer complaints filed directly with NHTSA.
Problems by System / Component
2021 Jeep Gladiator EcoDiesel 4WD problems by category: Steering: 87 complaints, Power Train: 64 complaints, Engine: 54 complaints, Electrical System: 41 complaints, Suspension: 39 complaints, Fuel System: 29 complaints, Brakes: 15 complaints, Lighting: 13 complaints.
Sample Owner Complaints
Complaint data is sourced from the NHTSA Complaints Database. Reports are filed by vehicle owners and may not reflect confirmed defects. Last updated via NHTSA API.