2020 head-to-head · Compact Car
2020 Chevrolet Sonic vs Mazda CX-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.
FWD · 1.4L 4-cyl turbo · 6-speed automatic · 29 MPG
The 2020 Mazda CX-3 is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas, it costs about $1,500 a year to fuel (31 MPG), versus $1,603 for the 2020 Chevrolet Sonic (29 MPG). That's roughly $103 a year, or about $517 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
- Chevrolet Sonic
- Mazda CX-3
Side by side
| Chevrolet Sonic | Mazda CX-3 | |
|---|---|---|
| $1,603 | Your annual fuel cost | $1,500 |
| 29 MPG | Combined efficiency | 31 MPG |
| 26 MPG | City | 29 MPG |
| 34 MPG | Highway | 34 MPG |
| 91 cu ft | Passenger volume | 88 cu ft |
| 12 cu ft | Cargo volume | 16 cu ft |
| 308 g/mi | Tailpipe CO₂ (g/mi) | 289 g/mi |
| 6/10 | EPA fuel economy score | 7/10 |
| 6/10 | EPA greenhouse gas score | 7/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Regular gasoline |
| 1.4L 4-cyl turbo | Engine / motor | 2.0L 4-cyl |
| 6-speed automatic | 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.
Chevrolet Sonic vs Mazda CX-3 across model years
- Chevrolet Sonic
- Mazda CX-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 Chevrolet Sonic has more passenger space (91 vs. 88 cu ft); the Mazda CX-3 has more cargo space (16 vs. 12 cu ft).
Among 34 2020 compact cars, the Chevrolet Sonic ranks 15th and the Mazda CX-3 13th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2020 Chevrolet Sonic or the 2020 Mazda CX-3?
Measured by cost to drive, the Mazda CX-3. The Chevrolet Sonic is rated 29 MPG combined and the Mazda CX-3 31 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2020 Chevrolet Sonic vs. the Mazda CX-3 per year?
At 15,000 miles a year with $3.10/gal regular gas, about $1,603 for the Chevrolet Sonic and $1,500 for the Mazda CX-3.
Which has more cargo space?
The Mazda CX-3, with 16 cu ft of luggage volume versus 12 cu ft (EPA interior volume index).
Chevrolet Sonic vs Mazda CX-3 in other years
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