Infiniti Q40 Fuel Economy (MPG)
What is the real-world gas mileage of a 2015 Infiniti Q40?
The 2015 Infiniti Q40 gets up to 22 MPG combined (19 city / 27 highway) in EPA testing.
Latest model year (2015):
The Infiniti Q40 gets up to 22 MPG combined (19 city / 27 highway) in the Auto (S7), 6 cyl, 3.7 L trim.
Infiniti Q40 MPG — All Years
| Year | Trim | Engine | Fuel | City (MPG) | Hwy (MPG) | Combined (MPG) |
|---|---|---|---|---|---|---|
| 2015Config 1 of 2 | Auto (S7), 6 cyl, 3.7 L | 6 3.7L | Premium Gasoline | 19 | 27 | 22 |
| 2015Config 2 of 2 | Auto (S7), 6 cyl, 3.7 L | 6 3.7L | Premium Gasoline | 18 | 25 | 20 |
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.
Infiniti Q40 data analysis
How Infiniti Q40 combined fuel economy varies
Across 2 configurations recorded for the 2015 Infiniti Q40, combined fuel economy runs from 20 MPG to 22 MPG. The strongest figure belongs to the 2015 Infiniti Q40 (Auto (S7), 6 cyl, 3.7 L) at 22 MPG, and the weakest to the 2015 car (Auto (S7), 6 cyl, 3.7 L) at 20 MPG — a spread of 10%. The narrow spread means any year of the Infiniti Q40 in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.
How to read this Infiniti Q40 data
This page lists every 2015 Infiniti Q40 record we hold for this measurement — 2 rows 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 Infiniti Q40 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 Infiniti Q40 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 | 27 MPG | 27 MPG | 0% |
| 65 mph | 27 MPG | 25.2 MPG | 7% |
| 70 mph | 27 MPG | 23.4 MPG | 13% |
| 75 mph | 27 MPG | 21.8 MPG | 19% |
| 80 mph | 27 MPG | 20.4 MPG | 25% |
Our Real-World Speed MPG Adjuster re-scales the Infiniti Q40 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 Q40 MPG
What is the MPG of the Infiniti Q40?
The Infiniti Q40 gets up to 22 MPG combined (19 city / 27 highway) in the 2015 model year. Fuel economy varies by engine and trim — see the full table above for details.
Which Infiniti Q40 trim has the best fuel economy?
The Auto (S7), 6 cyl, 3.7 L trim offers the best combined fuel economy at 22 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.
MPG for other Infiniti models
MPG on other brands
- Acura ADX MPG
- Alfa Romeo Stelvio MPG
- Aston Martin DB12 S MPG
- Audi Q3 MPG
- Bentley Continental Supersports MPG
- BMW 2 Series MPG
- Bugatti Divo MPG
- Bugatti Rimac Nevera MPG
- Buick Cascada MPG
- BYD e6 MPG
- Cadillac OPTIQ MPG
- Chevrolet Sonic MPG
- Chrysler Voyager MPG
- Dodge Hornet MPG
- Ferrari GTC4Lusso MPG
- Fiat 500 MPG
- Fisker Ocean MPG
- Ford Transit Connect MPG
- Genesis G70 MPG
- GMC Yukon MPG
- Honda Accord MPG
- Hyundai Genesis MPG
- INEOS Automotive Grenadier MPG
- Jaguar XF MPG
- Jeep Grand Cherokee MPG
- Karma GS-6 MPG
- Kia Soul MPG
- Koenigsegg Regera MPG
- Lamborghini Aventador MPG
- Land Rover LR4 MPG
- Lexus UX MPG
- Lincoln MKZ MPG
- Lordstown Endurance MPG
- Lotus Evora MPG
- Lucid Gravity MPG
- Maserati MC20 MPG
- Mazda 3 MPG
- McLaren Automotive 650S Spider MPG
- Mercedes-Benz G-Class MPG
- MINI Cooper MPG
- Mitsubishi Lancer MPG
- Mobility Ventures LLC MV-1 MPG
- Nissan Titan MPG
- Pagani Huayra MPG
- Polestar 1 MPG
- Porsche Boxster MPG
- Ram C/V MPG
- Rivian R1S MPG
- Rolls-Royce Phantom MPG
- Roush Performance Stage 3 Mustang MPG
- RUF Automobile T12/CTR3/CTR Anniversary MPG
- Scion tC MPG
- smart fortwo MPG
- STI S209 MPG
- Subaru Forester MPG
- Tesla Cybertruck MPG
- Toyota 4Runner MPG
- Vinfast VF 7 MPG
- Volkswagen Jetta MPG
- Volvo V60 MPG