2019-2026 Mazda3 MPG & Fuel Cost

EPA rates the 2019-2026 Mazda3 at 26–31 MPG combined across 59 configurations and 8 model years. The most efficient version, the 2025 4-Door 2.5L 4-cyl FWD, is rated 31 MPG (27 city, 37 highway).

The 4-Door 2.5L 4-cyl FWD reached the generation's best combined rating, 31 MPG, in 2021, 2022, 2023, 2024 and 2025. The lowest top rating, 30 MPG, was in 2019, 2020 and 2026.

Yes. Ratings changed in 2020, 2021, 2022, 2023, 2024, 2025 and 2026.

The previous generation (2014-2018 Mazda3) is rated 28–33 MPG combined and costs $1,950–$2,350 a year to fuel; the 2019-2026 model is rated 26–31 MPG and costs $2,100–$2,480 a year.

Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the 4-Door 2.5L 4-cyl FWD costs about $2,160 a year. Across all 7 configurations the cost runs $2,160–$2,480 a year. That is a $320 difference between the cheapest and the costliest configuration.

About $14.40 per 100 miles for the 4-Door 2.5L 4-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $14.40 and $16.53 across all configurations. That is the annual cost over 15,000 miles divided by 150.

The 4-Door 2.5L 4-cyl FWD is rated 27 city and 36 highway MPG, so it is more efficient on the highway, by 9 MPG.

The 4-Door 2.5L 4-cyl FWD costs about $2,160 a year to fuel, $50 more than the class median of $2,110, and less than 5 of 10 midsize car configurations. The comparison covers all 94 rated midsize car configurations for MY2026, not weighted by sales.

The most efficient configuration moves from 31 to 30 MPG, down 1. Its annual cost goes from $2,110 to $2,160, $50 more. EPA lists 7 configurations for 2026 against 7 configurations for 2025. See the 2025 Mazda3 for that year.