#6: 2013 GMC K15 Sierra
- MPG: 14
- Engine type: gasoline
- Car type: four-wheel drive, standard pickup truck
- Fuel cost per year: $4,000
- Sticker price/base model: $22,195
Unlike many of the inefficient cars 24/7 Wall St. reviewed, and unlike pickup trucks in particular, the Sierra is available in hybrid form. It also includes sophisticated interior features and a reasonably good safety rating. RL Polk reports 64,915 registrations since 2008, making the Sierra one of the most popular on this list. Faring slightly better in combined mpg than the others on this list, the GMC K15 Sierra still has very poor fuel economy, with 12 estimated mpg for city driving and 18 mpg on the highway. According to the EPA, the Sierra requires 1.8 gallons of fuel to travel 25 miles, which will cost $6.64 at current gas prices.
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