2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD: MPG and fuel economy
The 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD is rated by the U.S. Environmental Protection Agency at 23 combined MPG, with 21 MPG in the city and 26 MPG on the highway. That lands well below the average for cars in the Small Sport Utility Vehicle 4WD class in the same model year.
This page collects every fuel-economy figure the EPA publishes for the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD. Below you will find the headline combined, city, and highway MPG, the estimated annual fuel cost at three different driving levels, the tailpipe CO₂ emissions, and a full breakdown of the engine and drivetrain. If you want to know whether this generation got more or less efficient over the years, the year-over-year table further down covers every model year the EPA has rated.
Key takeaways
- The most efficient car in the Small Sport Utility Vehicle 4WD class for the 2021 model year is the Tesla Model Y Long Range AWD at 125 MPG.
- EPA estimates this car costs around $6,750 more in fuel over five years than an average new vehicle of the same model year.
Fuel economy at a glance
These are the EPA's official ratings for the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD. The numbers come from a standardised laboratory test cycle and are the same figures that appear on the window sticker of every new car. Real-world mileage varies with driving style, weather, fuel quality, and how heavily loaded the car is.
Combined MPG is a 55/45 weighted blend of the city and highway test cycles. The EPA uses it as the single number you can compare across the entire dataset, including hybrids and EVs (which use the equivalent MPGe figure).
| Combined MPG | 23 MPG |
| City MPG | 21 MPG |
| Highway MPG | 26 MPG |
| Annual fuel cost | $3,500 |
| Tailpipe CO₂ | 442 g/mi |
| Fuel type | Diesel |
How the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD compares
The 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD returns 23 combined MPG. Cars in the Small Sport Utility Vehicle 4WD class for the same model year average 27.7 MPG, which puts this car behind the class average by about 17%.
The most efficient car in the Small Sport Utility Vehicle 4WD class for the 2021 model year is the Tesla Model Y Long Range AWD at 125 MPG. The bar chart below puts the Jeep Wrangler Rubic 4dr EcoDiesel 4WD alongside the class best and the class average so you can see the full picture.
For broader context, the average new car of the 2021 model year (across all classes) returns 27.9 MPG. Larger vehicles pull the all-cars average down, so do not use that figure on its own to judge a small car or a hybrid. The full list of the most efficient cars of the 2021 model year is on its own page.
Annual fuel cost across driving patterns
The headline annual fuel cost the EPA publishes assumes 15,000 miles of driving per year and a fuel mix of 55% city and 45% highway. The dollar figure is calculated using the EPA's current reference price for diesel, which is $5.40/gallon. EPA updates that reference periodically rather than tracking live pump prices, so treat it as a window-sticker estimate rather than today's pump number.
The table below scales the EPA's number to three common driving patterns. The combined MPG and the reference fuel price stay constant, only the annual mileage changes. To get a current-prices estimate, take your local gas price and multiply by 652.2 gallons (the car's annual consumption at the rated MPG).
| Driving pattern | Estimated annual fuel cost |
|---|---|
| Light driver, 7,500 miles per year | $1,750 |
| Average driver, 15,000 miles per year | $3,500 |
| Heavy driver, 25,000 miles per year | $5,833 |
Year-over-year MPG for the Jeep Wrangler Rubic 4dr EcoDiesel 4WD
The EPA has rated the Jeep Wrangler Rubic 4dr EcoDiesel 4WD across 3 model years, from 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD through 2023 Jeep Wrangler Rubic 4dr EcoDiesel 4WD. The numbers below are the best combined MPG figure the EPA published for each year, which lets you see when the car was at its most efficient and how recent generations stack up.
Combined MPG has stayed in roughly the same range across the run, hovering close to 23 MPG.
| Year | Combined MPG | Open year page |
|---|---|---|
| 2023 | 23 MPG | 2023 Jeep Wrangler Rubic 4dr EcoDiesel 4WD |
| 2022 | 23 MPG | 2022 Jeep Wrangler Rubic 4dr EcoDiesel 4WD |
| 2021 | 23 MPG | this page |
Compare against other Small Sport Utility Vehicle 4WD for 2021
If you are cross-shopping the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD, the most useful comparison is against the other cars in the Small Sport Utility Vehicle 4WD class for the same model year. The list below shows the highest-MPG peers, ranked from most to least efficient. Click any of them to open its full page.
The Tesla Model Y Long Range AWD leads this group at 125 MPG, 102 MPG ahead of the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD.
Specifications
The 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD runs a 3-liter 6-cylinder turbocharged engine paired with a automatic 8-spd, sending power through 4-wheel drive.
Engine, transmission, and drivetrain together drive most of the variation in fuel economy across trims. A larger engine moves the car with less effort but burns more fuel. A turbo lets a small engine punch above its weight, often without much MPG penalty. All-wheel drive adds traction and weight, and usually costs a couple of MPG compared with two-wheel drive of the same engine.
- Vehicle class
- Small Sport Utility Vehicle 4WD
- Engine
- 3L 6-cylinder turbocharged
- Transmission
- Automatic 8-spd
- Drivetrain
- 4-Wheel Drive
- Fuel type
- Diesel
- Annual petroleum use
- 15.5 barrels per year
- Start-stop system
- Yes
Common questions about the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD
Quick answers to the questions people most often search for when looking up the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD.
-
Is the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD fuel efficient?
Not particularly. The 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD returns 23 combined MPG, which trails the average car in the Small Sport Utility Vehicle 4WD class for the same model year by about 17%. -
What MPG does the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD get?
The EPA rates the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD at 23 combined MPG, 21 MPG in city driving, and 26 MPG on the highway. Real-world numbers depend on your driving style, the weather, and how loaded the car is. -
How much does it cost to fuel a 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD per year?
The EPA estimates an annual fuel cost of $3,500 for the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD. That figure assumes 15,000 miles of driving per year, a 55% city and 45% highway split, and the EPA's published average fuel price for the rated fuel grade. -
What fuel does the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD use?
The EPA lists the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD as running on diesel. Using a different grade than the manufacturer specifies can affect fuel economy and engine longevity. -
Has the Jeep Wrangler Rubic 4dr EcoDiesel 4WD become more fuel efficient over time?
Combined MPG has stayed close to flat across the run. Both the earliest (2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD, 23 MPG) and most recent (2023 Jeep Wrangler Rubic 4dr EcoDiesel 4WD, 23 MPG) versions sit in the same range. -
How much CO₂ does the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD emit?
Tailpipe CO₂ emissions are 442 g/mi. Multiplied across a typical year of driving (15,000 miles) that works out to about 6,630 kilograms of CO₂. -
What is the difference between the city and highway MPG of the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD?
City driving returns 21 MPG and highway driving returns 26 MPG, a gap of 5 MPG. The two figures are close enough that the car will hold its rated efficiency well across most driving patterns. -
What engine is in the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD?
The 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD has a 3-liter 6-cylinder turbocharged engine. -
What transmission and drivetrain does the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD have?
The 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD comes with a automatic 8-spd transmission and 4-wheel drive. -
How does the 2021 Jeep Wrangler Rubic 4dr EcoDiesel 4WD compare to the best car in its class?
The most efficient car in the Small Sport Utility Vehicle 4WD class for the 2021 model year is the Tesla Model Y Long Range AWD at 125 combined MPG. The Jeep Wrangler Rubic 4dr EcoDiesel 4WD returns 23 MPG, a gap of 102 MPG. If you are comparing on fuel economy alone, the class leader is worth a look.
Source: U.S. EPA fuel economy dataset. Annual fuel cost figures assume 15,000 miles of driving per year and a 55% city, 45% highway split. Real-world mileage varies with driving conditions, vehicle maintenance, fuel quality, and driver behaviour.