- Newest year: 2013
- Gas
- Midsize cars
2011-2013 Infiniti M56 MPG & Fuel Cost
3 model years · 18–19 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 1 of 10 midsize car configurations, MY2013. Ranked against all rated configurations, not sales-weighted.
2011-2013 Infiniti M56 at a glance
The 2011-2013 Infiniti M56 covers 3 model years in the EPA database (6 configurations in all), rated 18–19 MPG combined. The newest model year, 2013, costs about $4,310 a year to fuel for its most efficient version, the M56 5.6L 8-cyl RWD (19 MPG), at premium gasoline $5.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2012 and 2013.
2011-2013 Infiniti M56 by model year
What the 2013 M56 5.6L 8-cyl RWD costs to drive
Per month
$359
$4,310 a year ÷ 12
Per 25 miles
$7.18
Per 100 miles
$28.73
Five years
$21,550
5 × the yearly cost, prices held at today's level
vs the midsize car median
$1,550more a year
Class median $2,760 a year, MY2013
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2013 Infiniti M56 MPG
Versus 2012: The most efficient configuration stays at 19 MPG. Its annual cost goes from $4,330 to $4,310, $20 less.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| M56 (Most efficient) | 5.6L 8-cyl | RWD | 16 | 24 | 19 | $4,310 |
| M56x | 5.6L 8-cyl | AWD | 16 | 23 | 18 | $4,390 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2012 Infiniti M56 MPG
18–19 MPG · $4,330–$4,370/yr
Versus 2011: The most efficient configuration stays at 19 MPG. Its annual cost goes from $4,190 to $4,330, $140 more.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| M56 (Most efficient) | 5.6L 8-cyl | RWD | 16 | 24 | 19 | $4,330 |
| M56x | 5.6L 8-cyl | AWD | 16 | 23 | 18 | $4,370 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2011 Infiniti M56 MPG
18–19 MPG · $4,190–$4,370/yr
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| M56 (Most efficient) | 5.6L 8-cyl | RWD | 16 | 25 | 19 | $4,190 |
| M56x | 5.6L 8-cyl | AWD | 16 | 23 | 18 | $4,370 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the M56 5.6L 8-cyl RWD: $5,130 in California and $3,730 in Texas, a $1,400 difference.
- California $5,130
- Washington $4,830
- New York $4,250
- Florida $3,930
- Texas $3,730
Similar cars
Closest combined MPG among MY2013 midsize car models.
Generations
- 2011-2013
Frequently asked questions
What gas mileage does the 2011-2013 Infiniti M56 get?
EPA rates the 2011-2013 Infiniti M56 at 18–19 MPG combined across 6 configurations and 3 model years. The most efficient version, the 2013 M56 5.6L 8-cyl RWD, is rated 19 MPG (16 city, 24 highway).
Which years had the best MPG in the 2011-2013 Infiniti M56?
Every model year of the 2011-2013 Infiniti M56 tops out at 19 MPG combined, so no year is better than another.
Did EPA ratings change during the 2011-2013 Infiniti M56?
Yes. Ratings changed in 2012 and 2013.
How much does it cost to fuel a 2013 Infiniti M56 per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the M56 5.6L 8-cyl RWD costs about $4,310 a year. Across all 2 configurations the cost runs $4,310–$4,390 a year. That is a $80 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2013 Infiniti M56 100 miles?
About $28.73 per 100 miles for the M56 5.6L 8-cyl RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $28.73 and $29.27 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2013 Infiniti M56 more efficient in the city or on the highway?
The M56 5.6L 8-cyl RWD is rated 16 city and 24 highway MPG, so it is more efficient on the highway, by 8 MPG.
How does the 2013 Infiniti M56 compare with other midsize car configurations?
The M56 5.6L 8-cyl RWD costs about $4,310 a year to fuel, $1,550 more than the class median of $2,760, and less than 1 of 10 midsize car configurations. The comparison covers all 186 rated midsize car configurations for MY2013, not weighted by sales.
Is the 2013 Infiniti M56 different from the 2012 model?
The most efficient configuration stays at 19 MPG. Its annual cost goes from $4,330 to $4,310, $20 less. EPA lists 2 configurations for 2013 against 2 configurations for 2012. See the 2012 Infiniti M56 for that year.