2025 head-to-head · Midsize Car
2025 Honda Civic vs Mazda 3
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2025 Honda Civic is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $1,292 a year to fuel (36 MPG), versus $1,500 for the 2025 Mazda 3 (31 MPG). That's roughly $208 a year, or about $1,042 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Honda Civic
- Mazda 3
Side by side
| Honda Civic | Mazda 3 | |
|---|---|---|
| $1,292 | Your annual fuel cost | $1,500 |
| 36 MPG | Combined efficiency | 31 MPG |
| 32 MPG | City | 27 MPG |
| 41 MPG | Highway | 37 MPG |
| 99 cu ft | Passenger volume | 93 cu ft |
| 15 cu ft | Cargo volume | 13 cu ft |
| 248 g/mi | Tailpipe CO₂ (g/mi) | 287 g/mi |
| 7/10 | EPA fuel economy score | 6/10 |
| 7/10 | EPA greenhouse gas score | 6/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Regular gasoline |
| 2.0L 4-cyl | Engine / motor | 2.5L 4-cyl |
| CVT | Transmission | 6-speed automatic |
| FWD | Drivetrain | FWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Honda Civic vs Mazda 3 across model years
- Honda Civic
- Mazda 3
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Honda Civic has more passenger space (99 vs. 93 cu ft); the Honda Civic has more cargo space (15 vs. 13 cu ft).
Among 42 2025 midsize cars, the Honda Civic ranks 12th and the Mazda 3 18th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2025 Honda Civic or the 2025 Mazda 3?
Measured by cost to drive, the Honda Civic. The Honda Civic is rated 36 MPG combined and the Mazda 3 31 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2025 Honda Civic vs. the Mazda 3 per year?
At 15,000 miles a year with $3.10/gal regular gas, about $1,292 for the Honda Civic and $1,500 for the Mazda 3.
Which has more cargo space?
The Honda Civic, with 15 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
Honda Civic vs Mazda 3 in other years
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