2021 Mazda CX-30 MPG and Fuel Cost
The 2021 Mazda CX-30 is rated 25 to 28 mpg combined across 3 EPA-tested gas versions; the best is the 2.5L 4-cyl · FWD · 6-speed automatic.
EPA fuel economy
2021 Mazda CX-30 · 3 EPA-tested versionsBest EPA rating
28MPG combined
25 city 33 highway
$2,200 a year to fuel
2.5L 4-cyl · FWD · 6-speed automatic
Fuel cost: 15,000 miles a year at EPA's $4.00 a gallon (regular gas).
At EPA's price assumptions, fuel costs $2,200 to $2,500 a year. Ratings for the best versions are unchanged from 2020.
One of the CX-30 years to avoid
The 2021 drew 68 owner complaints in its first three years, against about 18 for a typical CX-30 year: 3.6 times as many.
Years to avoid: 2021. Based on owner complaints, not adjusted for sales.
Every CX-30 year rankedThe 2021 CX-30's recalls and problems
Every 2021 CX-30 version
EPA's ratings for each version it tested. Fuel cost is EPA's estimate for 15,000 miles a year at its current prices.
| Version | Combined | City / Hwy | Fuel / year |
|---|---|---|---|
2.5L 4-cyl · FWD · 6-speed automatic Best
EPA listing: CX-30 2WD (also CX-30 2WD) |
28 mpg | 25 / 33 | $2,200 |
2.5L 4-cyl · 4WD · 6-speed automatic
EPA listing: CX-30 4WD (also CX-30 4WD) |
26 mpg | 24 / 31 | $2,400 |
2.5L turbo 4-cyl · 4WD · 6-speed automatic
EPA listing: CX-30 4WD |
25 mpg | 22 / 30 | $2,500 |
Fuel cost at your prices
EPA's annual cost uses 15,000 miles a year, 55% city driving and its current prices: $4.00 a gallon for regular gas. Change the numbers to match your driving.
| Version | Per year | 5 years |
|---|---|---|
2.5L 4-cyl · FWD · 6-speed automatic | $2,143 | $10,714 |
2.5L 4-cyl · 4WD · 6-speed automatic | $2,308 | $11,538 |
2.5L turbo 4-cyl · 4WD · 6-speed automatic | $2,400 | $12,000 |
At the default settings the results match EPA's annual cost before EPA rounds it to the nearest $50.
Mazda CX-30 MPG by model year
The best-rated version in each model year; the highlighted year is this page. Gas: 26 to 29 mpg (every year from 2020 to 2026); highest in 2023.
2021: gas 28 mpgTap or drag across the chart for other years.
Show as a table
| Model year | Best gas version |
|---|---|
| 2020 | 28 |
| 2021 | 28 |
| 2022 | 26 |
| 2023 | 29 |
| 2024 | 29 |
| 2025 | 29 |
| 2026 | 27 |
Every CX-30 year's ratings in one table
How the 2021 CX-30 compares
2021 subcompact SUVs covered on this site, ranked by their best combined rating. Fuel cost is for each model's cheapest version to run, at EPA's prices.
| 2021 model | Best combined | Best gas | Fuel / year |
|---|---|---|---|
Best: gas |
33 mpg | 33 mpg | $1,900 |
Best: gas |
31 mpg | 31 mpg | $2,000 |
Best: gas |
31 mpg | 31 mpg | $2,000 |
Best: gas |
31 mpg | 31 mpg | $2,000 |
Best: gas |
30 mpg | 30 mpg | $2,100 |
Best: gas |
30 mpg | 30 mpg | $2,100 |
Best: gas |
30 mpg | 30 mpg | $2,100 |
Best: gas |
28 mpg | 28 mpg | $2,200 |
Mazda CX-30 This page Best: gas |
28 mpg | 28 mpg | $2,200 |
Best: gas |
27 mpg | 27 mpg | $2,300 |
2021 CX-30 recalls and complaints
Questions
Does 4WD lower the 2021 Mazda CX-30's gas mileage?
Yes. On versions that differ only in drive, 4WD lowers the combined rating by 2 mpg: the 2.5L 4-cyl gets 28 mpg combined with front-wheel drive and 26 with 4WD.
Does the 2021 Mazda CX-30 need premium gas?
No. EPA lists every 2021 Mazda CX-30 version on regular gasoline.
How does the 2021 CX-30's MPG compare with the 2020?
For 2021, the best gas version is rated 28 mpg, the same as the year before.
Sources and method
- US EPA and Department of Energy fuel economy data (fueleconomy.gov), file dated Nov 4, 2026.
- EPA fuel price assumptions: regular $4.00, midgrade $4.61, premium $5.01, diesel $6.13 a gallon; electricity $0.15 per kWh.
- Recall and complaint counts: NHTSA recall file dated Nov 12, 2026 and complaint file dated Nov 11, 2026.
Ratings are EPA estimates. Real-world mileage depends on how, where and in what weather you drive. How we build these pages. Spotted an error? Tell us.