- Newest year: 2021
- Gas
- Small cars
2016-2021 Mazda CX-3 MPG & Fuel Cost
6 model years · 29–31 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 8 of 10 small car configurations, MY2021. Ranked against all rated configurations, not sales-weighted.
2016-2021 Mazda CX-3 at a glance
The 2016-2021 Mazda CX-3 covers 6 model years in the EPA database (12 configurations in all), rated 29–31 MPG combined. The newest model year, 2021, costs about $2,130 a year to fuel for its most efficient version, the CX-3 2.0L 4-cyl FWD (31 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2017, 2018, 2019 and 2021; 2020 repeat the values of the year before.
2016-2021 Mazda CX-3 by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2021 | Gas | 29–31 MPG | $2,130–$2,240 | Ratings changed |
| 2020 | Gas | 29–31 MPG | $2,130–$2,240 | Same EPA ratings as 2019 |
| 2019 | Gas | 29–31 MPG | $2,130–$2,240 | Ratings changed |
| 2018 | Gas | 29–31 MPG | $2,100–$2,280 | Ratings changed |
| 2017 | Gas | 29–31 MPG | $2,100–$2,280 | Ratings changed |
| 2016 | Gas | 29–31 MPG | $2,110–$2,280 | First year |
What the 2021 CX-3 2.0L 4-cyl FWD costs to drive
Per month
$178
$2,130 a year ÷ 12
Per 25 miles
$3.55
Per 100 miles
$14.20
Five years
$10,650
5 × the yearly cost, prices held at today's level
vs the small car median
$1,080less a year
Class median $3,210 a year, MY2021
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2021 Mazda CX-3 MPG
Versus 2020: The most efficient configuration stays at 31 MPG. Its annual cost stays at $2,130.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CX-3 2.0L 4-cyl FWD (Most efficient) | 2.0L 4-cyl | FWD | 29 | 34 | 31 | $2,130 |
| CX-3 2.0L 4-cyl 4WD | 2.0L 4-cyl | 4WD | 27 | 32 | 29 | $2,240 |
2020 Mazda CX-3 MPG
Same EPA ratings as 2019
EPA lists the same ratings for the 2020 Mazda CX-3 as for the 2019 model, so the configurations and costs are the ones in the 2019 section above.See 2019
2019 Mazda CX-3 MPG
29–31 MPG · $2,130–$2,240/yr
Versus 2018: The most efficient configuration stays at 31 MPG. Its annual cost goes from $2,100 to $2,130, $30 more.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CX-3 2.0L 4-cyl FWD (Most efficient) | 2.0L 4-cyl | FWD | 29 | 34 | 31 | $2,130 |
| CX-3 2.0L 4-cyl 4WD | 2.0L 4-cyl | 4WD | 27 | 32 | 29 | $2,240 |
2018 Mazda CX-3 MPG
29–31 MPG · $2,100–$2,280/yr
Versus 2017: The most efficient configuration stays at 31 MPG. Its annual cost stays at $2,100.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CX-3 2.0L 4-cyl FWD (Most efficient) | 2.0L 4-cyl | FWD | 29 | 34 | 31 | $2,100 |
| CX-3 2.0L 4-cyl 4WD | 2.0L 4-cyl | 4WD | 27 | 32 | 29 | $2,280 |
2017 Mazda CX-3 MPG
29–31 MPG · $2,100–$2,280/yr
Versus 2016: The most efficient configuration stays at 31 MPG. Its annual cost goes from $2,110 to $2,100, $10 less.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CX-3 2.0L 4-cyl FWD (Most efficient) | 2.0L 4-cyl | FWD | 29 | 34 | 31 | $2,100 |
| CX-3 2.0L 4-cyl 4WD | 2.0L 4-cyl | 4WD | 27 | 32 | 29 | $2,280 |
2016 Mazda CX-3 MPG
29–31 MPG · $2,110–$2,280/yr
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CX-3 2.0L 4-cyl FWD (Most efficient) | 2.0L 4-cyl | FWD | 29 | 35 | 31 | $2,110 |
| CX-3 2.0L 4-cyl 4WD | 2.0L 4-cyl | 4WD | 27 | 32 | 29 | $2,280 |
Fuel cost by state
Yearly cost of the CX-3 2.0L 4-cyl FWD: $2,890 in California and $1,860 in Texas, a $1,030 difference.
- California $2,890
- Washington $2,680
- New York $2,130
- Florida $2,010
- Texas $1,860
Similar cars
Closest combined MPG among MY2021 small car models.
Generations
- 2016-2021
Frequently asked questions
What gas mileage does the 2016-2021 Mazda CX-3 get?
EPA rates the 2016-2021 Mazda CX-3 at 29–31 MPG combined across 12 configurations and 6 model years. The most efficient version, the 2021 CX-3 2.0L 4-cyl FWD, is rated 31 MPG (29 city, 34 highway).
Which years had the best MPG in the 2016-2021 Mazda CX-3?
Every model year of the 2016-2021 Mazda CX-3 tops out at 31 MPG combined, so no year is better than another.
Did EPA ratings change during the 2016-2021 Mazda CX-3?
Yes. Ratings changed in 2017, 2018, 2019 and 2021. In 2020 the values repeat the year before.
How much does it cost to fuel a 2021 Mazda CX-3 per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the CX-3 2.0L 4-cyl FWD costs about $2,130 a year. Across all 2 configurations the cost runs $2,130–$2,240 a year. That is a $110 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2021 Mazda CX-3 100 miles?
About $14.20 per 100 miles for the CX-3 2.0L 4-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $14.20 and $14.93 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2021 Mazda CX-3 more efficient in the city or on the highway?
The CX-3 2.0L 4-cyl FWD is rated 29 city and 34 highway MPG, so it is more efficient on the highway, by 5 MPG.
How does the 2021 Mazda CX-3 compare with other small car configurations?
The CX-3 2.0L 4-cyl FWD costs about $2,130 a year to fuel, $1,080 less than the class median of $3,210, and less than 8 of 10 small car configurations. The comparison covers all 298 rated small car configurations for MY2021, not weighted by sales.
Is the 2021 Mazda CX-3 different from the 2020 model?
The most efficient configuration stays at 31 MPG. Its annual cost stays at $2,130. EPA lists 2 configurations for 2021 against 2 configurations for 2020. See the 2020 Mazda CX-3 for that year.