Nissan Titan 4WD
Combined mpg: 14 mpg city/highway
Base price: $32,120

Expect to use a titanic amount of gasoline if you buy a Titan, as this brawny pickup truck from Nissan ( NSANY) gets just 12 mpg/city and 17 mpg/highway when outfitted with four-wheel drive.

That's mostly because the Titan combines a 317-horsepower V-8 engine with a cargo bed that's more than 7 feet long, plus a passenger cabin that's outfitted with room for up to six people.

Add in optional 20-inch wheels and available BF Goodrich Rugged Trail all-terrain tires and you wind up with a massive, low-mpg vehicle that can have a curb weight as high as 5,556 pounds.

Of course, all of that bulk gives the Titan great off-road capability, plus as much as 9,500 pounds of towing capacity. Some Titans even have 125.6 cubic feet of passenger space -- about 25% more than you'd get with a Nissan Altima midsized sedan.

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