2021 · Midsize Car · Gas
2021 Mazda 6 MPG & fuel economy
The 2021 Mazda 6 is a midsize car offered in 2 EPA-rated configurations. The most efficient version returns 29 MPG combined (26 city / 35 highway) on regular gasoline. Across the lineup, combined ratings range from 26 to 29 MPG. Efficiency is unchanged from the 2020 model. Among 54 midsize cars rated for 2021, it ranks 23rd for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $1,603 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2021 Mazda 6's fuel average is 12.3 km/L (8.1 L/100 km), or 29 MPG combined: 11.1 km/L in the city and 14.9 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 26 | 11.1 | 9.0 |
| Highway | 35 | 14.9 | 6.7 |
| Combined | 29 | 12.3 | 8.1 |
How it ranks among 2021 Midsize Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
6 MPG across model years
Full history →2 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| FWD · 2.5L 4-cyl · 6-speed automatic 6 |
Gas | 26 MPG | 35 MPG | 29 MPG | — | $1,603 |
| FWD · 2.5L 4-cyl turbo · 6-speed automatic 6 |
Gas | 23 MPG | 31 MPG | 26 MPG | — | $1,788 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 2.5L 4-cyl
- Transmission
- 6-speed automatic
- Drivetrain
- FWD
- Passenger volume
- 100 cu ft
- Cargo volume
- 15 cu ft
- Tailpipe CO₂
- 302 g/mi
- EPA fuel economy score
- 6/10
- EPA greenhouse gas score
- 6/10
2021 Mazda 6 vs. rivals
Compare the 2021 6
With any other car from any year, including other 6 model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2021 Mazda 6?
Up to 29 MPG combined (26 city / 35 highway); ratings range from 26 to 29 MPG depending on configuration.
What fuel does the 2021 Mazda 6 use?
Regular gasoline.
What is the fuel average in km/L for the 2021 Mazda 6?
The 2021 Mazda 6's fuel average is 12.3 km/L (8.1 L/100 km), or 29 MPG combined: 11.1 km/L in the city and 14.9 km/L on the highway.
How much does it cost to fuel the 2021 Mazda 6 per year?
About $1,603 at 15,000 miles a year with $3.10/gal regular gas, or $10.69 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.