2015 head-to-head · Midsize Car
2015 Infiniti Q40 vs Lexus GS
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2015 Lexus GS is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,576 a year to fuel (23 MPG), versus $2,693 for the 2015 Infiniti Q40 (22 MPG). That's roughly $117 a year, or about $585 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Infiniti Q40
- Lexus GS
Side by side
| Infiniti Q40 | Lexus GS | |
|---|---|---|
| $2,693 | Your annual fuel cost | $2,576 |
| 22 MPG | Combined efficiency | 23 MPG |
| 19 MPG | City | 19 MPG |
| 27 MPG | Highway | 29 MPG |
| 99 cu ft | Passenger volume | 99 cu ft |
| 14 cu ft | Cargo volume | 14 cu ft |
| 412 g/mi | Tailpipe CO₂ (g/mi) | 392 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 3.7L 6-cyl | Engine / motor | 3.5L 6-cyl |
| 7-speed automatic | Transmission | 8-speed automatic |
| RWD | Drivetrain | RWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Infiniti Q40 vs Lexus GS across model years
- Infiniti Q40
- Lexus GS
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Among 69 2015 midsize cars, the Infiniti Q40 ranks 55th and the Lexus GS 51st for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Infiniti Q40 or the 2015 Lexus GS?
Measured by cost to drive, the Lexus GS. The Infiniti Q40 is rated 22 MPG combined and the Lexus GS 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Infiniti Q40 vs. the Lexus GS per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,693 for the Infiniti Q40 and $2,576 for the Lexus GS.
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