Scion iQ Fuel Economy (MPG)
What is the real-world gas mileage of a 2015 Scion iQ?
The 2015 Scion iQ gets up to 37 MPG combined (36 city / 37 highway) in EPA testing.
Latest model year (2015):
The Scion iQ gets up to 37 MPG combined (36 city / 37 highway) in the Auto (variable gear ratios), 4 cyl, 1.3 L trim.
Scion iQ MPG — All Years
| Year | Trim | Engine | Fuel | City (MPG) | Hwy (MPG) | Combined (MPG) |
|---|---|---|---|---|---|---|
| 2015 | Auto (variable gear ratios), 4 cyl, 1.3 L | 4 1.3L | Regular Gasoline | 36 | 37 | 37 |
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.
Scion iQ data analysis
How to read this Scion iQ data
This page lists every 2015 Scion iQ 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 Scion iQ 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 Scion iQ 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 | 37 MPG | 37 MPG | 0% |
| 65 mph | 37 MPG | 34.5 MPG | 7% |
| 70 mph | 37 MPG | 32.1 MPG | 13% |
| 75 mph | 37 MPG | 29.9 MPG | 19% |
| 80 mph | 37 MPG | 27.9 MPG | 25% |
Our Real-World Speed MPG Adjuster re-scales the Scion iQ 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 iQ MPG
What is the MPG of the Scion iQ?
The Scion iQ gets up to 37 MPG combined (36 city / 37 highway) in the 2015 model year. Fuel economy varies by engine and trim — see the full table above for details.
Which Scion iQ trim has the best fuel economy?
The Auto (variable gear ratios), 4 cyl, 1.3 L trim offers the best combined fuel economy at 37 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.
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