2014-2018 Mazda3 MPG & Fuel Cost

EPA rates the 2014-2018 Mazda3 at 28–33 MPG combined across 46 configurations and 5 model years. The most efficient version, the 2016 4-Door 2.0L 4-cyl FWD, is rated 33 MPG (30 city, 40 highway).

The 4-Door 2.0L 4-cyl FWD reached the generation's best combined rating, 33 MPG, in 2014, 2015 and 2016. The lowest top rating, 32 MPG, was in 2017 and 2018.

Yes. Ratings changed in 2015, 2016, 2017 and 2018.

The previous generation (2010-2013 Mazda3) is rated 23–32 MPG combined and costs $2,040–$2,830 a year to fuel; the 2014-2018 model is rated 28–33 MPG and costs $1,950–$2,350 a year.

Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the 5-Door 2.0L 4-cyl FWD costs about $2,070 a year. Across all 8 configurations the cost runs $2,070–$2,350 a year. That is a $280 difference between the cheapest and the costliest configuration.

About $13.80 per 100 miles for the 5-Door 2.0L 4-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $13.80 and $15.67 across all configurations. That is the annual cost over 15,000 miles divided by 150.

The 5-Door 2.0L 4-cyl FWD is rated 28 city and 37 highway MPG, so it is more efficient on the highway, by 9 MPG.

The 5-Door 2.0L 4-cyl FWD costs about $2,070 a year to fuel, $1,100 less than the class median of $3,170, and less than 9 of 10 small car configurations. The comparison covers all 365 rated small car configurations for MY2018, not weighted by sales.

The most efficient configuration stays at 32 MPG. Its annual cost stays at $2,070. EPA lists 8 configurations for 2018 against 10 configurations for 2017. See the 2017 Mazda3 for that year.