Official 2013 fuel-economy numbers haven't been published yet by the Environmental Protection Agency (EPA), but since it's carried over with no mechanical changes, we expect the Infiniti QX56 will maintain its low ratings.
Like other full-size sport-utility vehicles, the QX56 doesn't count gas mileage as a strong suit. It's pegged at 14 miles per gallon city, 20 miles per gallon by the agency, no matter which edition is specified--the rear-drive version or the one with four-wheel drive.
While those aren't stellar numbers, they are far better than Nissan's own Armada SUV and better than many other big luxury SUVs.
Infiniti has no plans for hybrid or diesel QX utes here in the U.S.