Against 381 other 4-cyl cars rated 2024–2026, the CX-30 sits right on their 26.3 mpg average.
Every Mazda CX-30 engine, compared
The Mazda CX-30 was rated in a single specification, so its gas mileage does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2.5L 4-cyl | 25.1 / 32.4 | 2020–2026 | $1,371 |
What that actually costs
Against its rivals in the same model years, the Toyota RAV4 gets 37.5 mpg, the Jeep Wrangler 18.8 mpg and the Honda CR-V 35 mpg, next to 27 mpg for the 2026 CX-30.
| Measure | Value |
|---|---|
| Cost per mile (2026) | $0.119 |
| Fuel per year | $1,422 |
| Fuel over five years | $7,110 |
| Against other 4-cyl cars, 2024–2026 | −$38 a year |
| EPA's own estimate | $2,221 a year |
City or highway — who is this car for
The 2026 Mazda CX-30 gives up 7 mpg in town: 31 on the highway against 24 in the city, $361 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2026) | 24 mpg | $1,600 a year if you only drive in town |
| Highway | 31 mpg | $1,239 a year if you mostly commute |
| Gap | +7 mpg (29%) | Typical for its type |
How the CX-30 changed over the years
The CX-30 peaked in 2025 at 29 mpg (26 city, 33 highway) and was at its thirstiest in 2022 at 26 — 3 mpg apart, or $153 a year in fuel between buying one year and the other. The 2026 car does 27. The 2026 model loses 2 mpg against 29 for the 2025. The biggest single-year change came in 2023: 26 to 29 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 24 / 31 | 1 | $1,422 | |
| 2025 | 26 / 33 | 1 | $1,324 | |
| 2024 | 26 / 33 | 1 | $1,324 | |
| 2023 | 26 / 33 | 1 | $1,324 | |
| 2022 | 24 / 31 | 1 | $1,477 | |
| 2021 | 25 / 33 | 1 | $1,371 | |
| 2020 | 25 / 33 | 1 | $1,371 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 7 EPA ratings of the Mazda CX-30 — 1 engine across 2020–2026. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $2,221. Full method.
Frequently asked questions
What mpg does the 2026 Mazda CX-30 get?
27 mpg combined, 24 city and 31 highway, per EPA. Across every year since 2020 the CX-30 has averaged 28 mpg.
Is the 2026 CX-30 more efficient than the 2025?
No: 27 against 29 mpg combined, about $98 a year more to run.
Which CX-30 year has the best gas mileage?
The 2025, at 29 mpg combined (26 city, 33 highway).
Does the CX-30 get better gas mileage than the Toyota RAV4?
No: 27 mpg for the 2026 CX-30 against 37.5 for the 2026 Toyota RAV4, about $398 a year more to run.
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