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Infiniti QX56

Photo: Infiniti QX56 by IFCAR, Public domain, via Wikimedia Commons. It shows the model, not always this exact version.

Infiniti · model year 2008

2008 Infiniti QX56 2WD

SUV · Rear-Wheel Drive · Gas · EPA class: Sport Utility Vehicle - 2WD

EPA figures · 2008fueleconomy.gov
14MPG combined
12/18MPG city / highway
$5,850fuel a year
635 g CO₂ per mile 5.6 L 8-cyl Automatic 5-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.

Where it places

The CarCody take

The 2008 Infiniti QX56 2WD is a gasoline SUV with rear-wheel drive, a 5.6-liter V8 and a five-speed automatic. Its EPA combined rating is 14 MPG, with 12 MPG city and 18 MPG highway. The EPA annual fuel-cost estimate is $5,850, and tailpipe CO2 is 634.79 grams per mile.

Good to know

  • Rear-wheel drive SUV layout
  • 5.6-liter eight-cylinder engine
  • 18 MPG EPA highway rating
  • Five-speed automatic transmission

Watch for

  • 14 MPG combined EPA rating
  • 12 MPG city EPA rating
  • $5,850 EPA annual fuel-cost estimate
  • 634.79 grams per mile of tailpipe CO2

Who it suits. Drivers seeking a rear-wheel-drive gasoline SUV Buyers who accept low fuel economy for this drivetrain

Choose this QX56 if a rear-wheel-drive SUV with a V8 and automatic transmission matches your needs more closely than fuel economy does. Its 18 MPG highway figure is notably higher than its 12 MPG city figure, but the combined result remains 14 MPG. Budget carefully for the EPA's $5,850 yearly gasoline estimate, and compare those numbers with other vehicles before deciding.

What it is

This 2008 Infiniti QX56 2WD is a sport utility vehicle that uses gasoline and rear-wheel drive. Power comes from a 5.6-liter, eight-cylinder engine paired with a five-speed automatic transmission.

Its defining EPA number is 14 MPG combined. The split is 12 MPG in city driving and 18 MPG on the highway.

The numbers

At 14 MPG combined, this QX56 is rated for 14 miles on a gallon across the EPA city-and-highway mix. Your result will follow how much of your driving is in town or on open roads.

The city figure is 12 MPG, while the highway figure is 18 MPG.

What it costs to run

The EPA annual fuel-cost estimate is $5,850. That figure is tied to the QX56's 14 MPG combined rating and gives a yearly budgeting point for gasoline use.

Tailpipe carbon dioxide is listed at 634.79 grams per mile.

How it compares

Its 12 MPG city rating is 6 MPG below its 18 MPG highway rating, so driving conditions make a clear difference. Use those two figures when weighing it against another SUV.

For a wider look at the marque's lineup, compare it with other Infiniti cars using the same EPA measures.

Who it suits

This QX56 suits a buyer who wants a gasoline SUV with rear-wheel drive and accepts a 14 MPG combined rating. It also fits drivers who separate mostly-city use from mostly-highway use when planning fuel spending.

Trade-offs

The 5.6-liter eight-cylinder engine and SUV body come with a low combined fuel rating of 14 MPG. City driving is rated at just 12 MPG, while highway use improves to 18 MPG.

The trade is straightforward: rear-wheel-drive SUV capability and a five-speed automatic, balanced against the EPA's $5,850 annual fuel-cost estimate.

Verdict

Choose this QX56 if a rear-wheel-drive SUV with a V8 and automatic transmission matches your needs more closely than fuel economy does. Its 18 MPG highway figure is notably higher than its 12 MPG city figure, but the combined result remains 14 MPG. Budget carefully for the EPA's $5,850 yearly gasoline estimate, and compare those numbers with other vehicles before deciding.

Every figure on record

Efficiency
Combined MPG
14 MPG
City MPG
12 MPG
Highway MPG
18 MPG
Running cost
Annual fuel cost
$5,850
Tailpipe CO₂
635 g per mile
The car
Model year
2008
Body
SUV
EPA size class
Sport Utility Vehicle - 2WD
Drive
Rear-Wheel Drive
Powertrain
Engine
5.6 L 8-cyl
Transmission
Automatic 5-spd
Fuel
Gasoline

Questions

What is the 2008 Infiniti QX56 2WD's combined MPG?

The EPA combined rating is 14 MPG.

What are its city and highway MPG figures?

It is rated at 12 MPG in the city and 18 MPG on the highway.

How much fuel cost does the EPA estimate each year?

The EPA annual fuel-cost estimate is $5,850.

What engine and transmission does it use?

It has a 5.6-liter eight-cylinder gasoline engine and a five-speed automatic transmission.

Is the 2008 QX56 2WD front-, rear-, or all-wheel drive?

This model uses rear-wheel drive.

How much tailpipe CO2 does it emit?

The listed tailpipe CO2 figure is 634.79 grams per mile.

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