# Mazda 6 specs and mpg by year

- **Latest year:** 2021
- **MPG (combined):** 26-29
- **Drive:** FWD
- **Years covered:** 2015-2021

## Quick answer

The 2021 Mazda 6 is a midsize car rated at 26-29 mpg combined. Engines: 2.5L 4-cyl; 2.5L 4-cyl turbo.

## Every 2021 Mazda 6 version

| Version | Engine | Drive | Transmission | City/Hwy | Combined | Fuel cost / year | CO2 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 6 | 2.5L 4-cyl | FWD | Automatic | 26/35 | 29 mpg | $2,300 | 302 g/mi |
| 6 | 2.5L 4-cyl turbo | FWD | Automatic | 23/31 | 26 mpg | $2,600 | 335 g/mi |

Each row is a version the EPA tested. Fuel cost assumes 15,000 miles a year (55% city) at national average prices; CO2 is tailpipe emissions.

## Mazda 6 specs by year

| Year | Engines | Transmission | Drive | MPG (combined) |
| --- | --- | --- | --- | --- |
| 2021 | 2.5L 4-cyl; 2.5L 4-cyl turbo | Automatic | FWD | 26-29 |
| 2020 | 2.5L 4-cyl; 2.5L 4-cyl turbo | Automatic | FWD | 26-29 |
| 2019 | 2.5L 4-cyl; 2.5L 4-cyl turbo | Manual, Automatic | FWD | 26-29 |
| 2018 | 2.5L 4-cyl; 2.5L 4-cyl turbo | Manual, Automatic | FWD | 26-29 |
| 2017 | 2.5L 4-cyl | Manual, Automatic | FWD | 28-30 |
| 2016 | 2.5L 4-cyl | Automatic, Manual | FWD | 29-32 |
| 2015 | 2.5L 4-cyl | Automatic, Manual | FWD | 29-32 |

EPA combined ratings. MPGe is the EPA efficiency measure for electric cars. Ranges cover every engine and drivetrain EPA tested for that year.

## How has the 6 changed over the years?

- **2018:** added 2.5L 4-cyl turbo.
- **2017:** combined mpg went from 29-32 to 28-30.

## Frequently asked questions

### What mpg does the 2021 Mazda 6 get?

The 2021 Mazda 6 is EPA-rated at 26-29 mpg combined, depending on engine and drivetrain. Real-world mileage varies with speed, climate and load.

### What engine does the 2021 Mazda 6 have?

The 2021 Mazda 6 comes with: 2.5L 4-cyl; 2.5L 4-cyl turbo. It uses automatic transmission and is offered with FWD.

### Is there a hybrid Mazda 6?

No. In the EPA data from 2015-2021 the Mazda 6 has no hybrid version.

### Which Mazda 6 year gets the best gas mileage?

In the EPA data, the 2016 Mazda 6 has the highest combined rating, up to 32 mpg. Ratings for the same model can change between years when engines or test procedures change.

### How much does it cost to fuel a 2021 Mazda 6 for a year?

About $2,300-$2,600 a year, using the EPA's assumptions of 15,000 miles (55% city, 45% highway) at national average fuel prices. Your cost depends on your local prices, mileage and driving style.

### What is the city and highway mpg of the 2021 Mazda 6?

The most efficient 2021 version, the 6, is rated 26 mpg city and 35 mpg highway (29 combined). Other engines and drivetrains are rated lower; the versions table above lists each one.

### How much CO2 does the 2021 Mazda 6 emit?

EPA rates its tailpipe CO2 at 302-335 grams per mile depending on version. Lower is better; the cleanest gas cars sit under 250 g/mi and electric cars have none at the tailpipe.

## Sources

- [fueleconomy.gov (US DOE and EPA)](https://www.fueleconomy.gov/)

## All Mazda cars

- [Mazda MX-5](https://diagxcar.com/vehicles/mazda-mx-5)
- [Mazda 3](https://diagxcar.com/vehicles/mazda-3)

## More Mazda models

- [Mazda CX-30](https://diagxcar.com/vehicles/mazda-cx-30)
- [Mazda CX-5](https://diagxcar.com/vehicles/mazda-cx-5)
- [Mazda CX-50](https://diagxcar.com/vehicles/mazda-cx-50)
- [Mazda CX-90](https://diagxcar.com/vehicles/mazda-cx-90)
- [Mazda 2](https://diagxcar.com/vehicles/mazda-2): discontinued
- [Mazda CX-3](https://diagxcar.com/vehicles/mazda-cx-3): discontinued
- [Mazda CX-9](https://diagxcar.com/vehicles/mazda-cx-9): discontinued

## Other midsize cars

- [Mercedes-Benz E-Class](https://diagxcar.com/vehicles/mercedes-benz-e-class)
- [Mini Clubman](https://diagxcar.com/vehicles/mini-clubman)
- [Nissan Altima](https://diagxcar.com/vehicles/nissan-altima)
- [Nissan Maxima](https://diagxcar.com/vehicles/nissan-maxima)
- [Nissan Sentra](https://diagxcar.com/vehicles/nissan-sentra)
- [Polestar 2](https://diagxcar.com/vehicles/polestar-2)
- [Subaru Legacy](https://diagxcar.com/vehicles/subaru-legacy)
- [Subaru WRX](https://diagxcar.com/vehicles/subaru-wrx)

## Car care

- [How long do tires last?](https://diagxcar.com/how-long/tires)
- [How often to change oil](https://diagxcar.com/how-often/change-oil)
- [Tire size calculator](https://diagxcar.com/tools/tire-size-calculator)

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Source page: https://diagxcar.com/vehicles/mazda-6
Updated: 2026-11-03
General information, not a substitute for a qualified mechanic.