Mazda 6 Annual Fuel Cost
Running a 2021 Mazda 6 costs about $1,900 per year in fuel, based on 15,000 miles of driving at average U.S. fuel prices.
Latest model year (2021):
The Mazda 6 costs an estimated $2,100/year in fuel (302 g CO₂/mi).
Mazda 6 Fuel Cost — All Years
| Year | Trim | Engine | Fuel | MPG Comb. | Annual Cost | CO₂ (g/mi) | GHG Score |
|---|---|---|---|---|---|---|---|
| 2021Config 1 of 2 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 26 | $2,350 | 335 | 5 |
| 2021Config 2 of 2 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 29 | $2,100 | 302 | 6 |
| 2020Config 1 of 2 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 26 | $2,350 | 335 | 5 |
| 2020Config 2 of 2 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 29 | $2,100 | 302 | 6 |
| 2019Config 1 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 29 | $2,100 | 302 | 6 |
| 2019Config 2 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 26 | $2,350 | 335 | 5 |
| 2019Config 3 of 3 | Man 6-spd, 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 27 | $2,300 | 328 | 6 |
| 2018Config 1 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 26 | $2,350 | 335 | 5 |
| 2018Config 2 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 29 | $2,100 | 302 | 6 |
| 2018Config 3 of 3 | Man 6-spd, 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 27 | $2,300 | 328 | 6 |
| 2017Config 1 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 29 | $2,100 | 304 | 7 |
| 2017Config 2 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 30 | $2,050 | 299 | 7 |
| 2017Config 3 of 3 | Man 6-spd, 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 28 | $2,200 | 315 | 6 |
| 2016Config 1 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 32 | $1,900 | 280 | 8 |
| 2016Config 2 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 30 | $2,050 | 295 | 7 |
| 2016Config 3 of 3 | Man 6-spd, 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 29 | $2,100 | 306 | 7 |
| 2015Config 1 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 30 | $2,050 | 298 | 7 |
| 2015Config 2 of 3 | Auto (S6), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 32 | $1,900 | 280 | 8 |
| 2015Config 3 of 3 | Man 6-spd, 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 29 | $2,100 | 308 | 7 |
Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.
Mazda 6 data analysis
How Mazda 6 estimated annual fuel cost varies
Across 19 configurations recorded for the 2015 through 2021 Mazda 6, estimated annual fuel cost runs from $1,900 to $2,350. The strongest figure belongs to the 2016 Mazda 6 (Auto (S6), 4 cyl, 2.5 L) at $1,900, and the weakest to the 2018 car (Auto (S6), 4 cyl, 2.5 L) at $2,350 — a spread of 19%. The narrow spread means any year of the Mazda 6 in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.
What changed for 2021
Average estimated annual fuel cost for the 2021 Mazda 6 is $2,225, against $2,225 for the 2020 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.
How to read this Mazda 6 data
This page lists every 2015 through 2021 Mazda 6 record we hold for this measurement — 19 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.
Configurations behind these Mazda 6 numbers
The 2015 through 2021 Mazda 6 entries here cover the variants Auto (S6), 4 cyl, 2.5 L and Man 6-spd, 4 cyl, 2.5 L. 2019 is the busiest model year in the record with 3 separate measured configurations, which is why a single quoted estimated annual fuel cost figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.
Where these Mazda 6 figures come from
Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Mazda 6 record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.
Frequently Asked Questions About 6 Fuel Cost
How much does it cost to fuel the Mazda 6?
The estimated annual fuel cost for the Mazda 6 is $1,900 per year, based on 15,000 miles of driving and average fuel prices. Costs vary by trim and engine.
How much CO₂ does the Mazda 6 produce?
The Mazda 6 produces approximately 280 grams of CO₂ per mile. Lower numbers mean fewer emissions. See the table for per-trim details.