- Gas
- Midsize cars
- MY2011–2013
Infiniti M56 MPG & Fuel Cost by Year
3 model years · 2011–2013
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Infiniti M56 fuel economy at a glance
EPA has rated the Infiniti M56 for 3 model years, 2011 to 2013. Across those years its combined rating runs 18–19 MPG. The latest model year, 2013, has 2 configurations rated 18–19 MPG combined and costing $4,310–$4,390 a year to fuel at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2011 is the 2013 M56 5.6L 8-cyl RWD, at 19 MPG.
Infiniti M56 MPG by year
| Year | Gas (MPG) | $/yr |
|---|---|---|
| 2011-2013 Generation page | ||
| 2013 | 18–19 | $4,310–$4,390 |
| 2012 | 18–19 | $4,330–$4,370 |
| 2011 | 18–19 | $4,190–$4,370 |
Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.
Infiniti M56 generations
1 generations between 2011 and 2013. Open one for the table of every model year and configuration.
2013 powertrain options
More Infiniti models
Frequently asked questions
What is the Infiniti M56's gas mileage by year?
EPA combined ratings for the Infiniti M56 run 18–19 MPG across model years 2011 to 2013. The latest year, 2013, is rated 18–19 MPG.
Which Infiniti M56 model year has the best gas mileage?
The 2013 Infiniti M56 M56 5.6L 8-cyl RWD has the highest combined rating since 2011, at 19 MPG.
How much does a Infiniti M56 cost to fuel per year?
For MY2013, EPA-rated configurations cost $4,310–$4,390 a year to fuel, driving 15,000 miles at premium gasoline $5.36/gal (U.S. average, Sep 2026). The most efficient one costs $4,310.
Has the Infiniti M56's fuel economy improved over time?
Not much. The most efficient configuration is rated 19 MPG in both 2011 and 2013.