2021 Mazda 6 — 2.5L 4-cyl, S6 automatic, FWD
This 2021 Mazda 6 (2.5L 4-cyl, S6 automatic, FWD) takes regular (87-octane) gasoline. REGULAR
29
MPG combined (26 city / 35 hwy)
$1,966
est. fuel cost / year (today’s prices, 15k mi)
302 g/mi
tailpipe CO₂
At today's AAA national average price ($3.80/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.
Other 2021 Mazda 6 trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 2.5L 4-cyl, S6 automatic, FWD | REGULAR | 26 | $2,192 |
EPA fuel type: Regular · class: Midsize Cars · engine: 2.5L 4-cyl · transmission: S6 automatic · drive: FWD · MPG retrieved 2026-07-24.