Mazda 5 Fuel Economy (MPG)
What is the real-world gas mileage of a 2015 Mazda 5?
The 2015 Mazda 5 gets up to 24 MPG combined (21 city / 28 highway) in EPA testing.
Latest model year (2015):
The Mazda 5 gets up to 24 MPG combined (21 city / 28 highway) in the Auto (S5), 4 cyl, 2.5 L trim.
Mazda 5 MPG — All Years
| Year | Trim | Engine | Fuel | City (MPG) | Hwy (MPG) | Combined (MPG) |
|---|---|---|---|---|---|---|
| 2015 | Auto (S5), 4 cyl, 2.5 L | 4 2.5L | Regular Gasoline | 21 | 28 | 24 |
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 5 data analysis
How to read this Mazda 5 data
This page lists every 2015 Mazda 5 record we hold for this measurement — 1 row 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.
Where these Mazda 5 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 5 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.
Official Factory Specs vs. AutoSpecData Expert Benchmarks
The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.
| Cruise speed | EPA highway spec | AutoSpecData adjusted MPG | Fuel you lose |
|---|---|---|---|
| 60 mph | 28 MPG | 28 MPG | 0% |
| 65 mph | 28 MPG | 25.6 MPG | 9% |
| 70 mph | 28 MPG | 23.4 MPG | 17% |
| 75 mph | 28 MPG | 21.4 MPG | 24% |
| 80 mph | 28 MPG | 19.6 MPG | 30% |
Our Real-World Speed MPG Adjuster re-scales the Mazda 5 EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.
Frequently Asked Questions About 5 MPG
What is the MPG of the Mazda 5?
The Mazda 5 gets up to 24 MPG combined (21 city / 28 highway) in the 2015 model year. Fuel economy varies by engine and trim — see the full table above for details.
Which Mazda 5 trim has the best fuel economy?
The Auto (S5), 4 cyl, 2.5 L trim offers the best combined fuel economy at 24 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.