Though the EPA hasn't confirmed its 2013 fuel-economy ratings as of yet, the Nissan Armada doesn't receive any powertrain changes for the year, and it's likely that its low, low gas mileage numbers carry over in unspectacular form.
Aside from the most exotic sportscars, few modern vehicles are rated as poorly in gas mileage as today's biggest SUVs. Escalades and Range Rovers--and Armadas--hardly push past into the double digits for their city fuel economy ratings.
In its most recent calculations, the EPA gave the V-8 Armada a peak rating of 13 miles per gallon city, 19 miles per gallon highway. That's for the rear-drive version; putting heavier four-wheel drive mechanicals on the body-on-frame chassis drops those figures to 12/18 mpg. There's no option for diesel or hybrid power to mitigate the situation either--the Armada comes only in one form, with a big V-8 and an automatic transmission.While we'd like to dismiss these very non-green figures as an aberration, we've seen it with out own eyes (and fuel budget) in repeat drives; Nissan's full-size trucks (and this V-8) are far from fuel-efficient—even when compared to full-size V-8 trucks from GM, Ford, or Toyota.