2013 GMC Terrain MPG

The 2013 GMC Terrain gets up to 26 miles to the gallon in combined city and highway driving, which is a competitive rating for a crossover SUV.
Written by James Ellaby
Reviewed by Kathleen Flear
The 2013 GMC Terrain offers up to 22 mpg for city driving and 31 mpg for highway driving, depending on the trim you choose. It’s not an amazing rating but certainly isn’t a reason to steer clear of this model.
Launched in 2009, the GMC Terrain has been a steady seller in the affordable crossover SUV market. The 2013 model scored highly for reliability, space, and comfort. It’s not necessarily a thrilling vehicle to drive, but is that what anyone looks for in this type of SUV?
Fuel economy is an important factor for some drivers, though. So, how does the 2013 GMC Terrain score? Here’s everything you need to know about its gas mileage.
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2013 GMC Terrain fuel economy

The 2013 GMC Terrain’s best fuel rating is 22 mpg for city driving and 31 mpg for highway driving for a combined EPA rating of 26 mpg. That’s respectable fuel economy, especially when you consider that the average combined rating for all vehicles in 2023 is 28 mpg—and we’re discussing a 10-year-old SUV.
However, it’s worth noting that you should only expect this gas mileage from the four-cylinder, 2.4L, automatic six-speed version of the Terrain when using regular fuel. The same model driving with E85 fuel would only get a combined 17 mpg.
Meanwhile, upgrading to a 3.6L engine reduces the fuel economy to 20 mpg combined—or as low as 14 mpg with E85 fuel. 
The gas tank on a 2013 GMC Terrain is 18 gallons, which would currently cost around $56 to fill. You should be able to drive around 468 miles on a full tank of gas, based on a combination of city and highway driving. That would cost around $1,800 a year in fuel, which would add up to around $750 more spent over five years than an average new car.

Is the 2013 GMC Terrain good on gas?

It’s true, you can expect to pay more for fuel over time with a 2013 Terrain compared to a newer vehicle. But how does it compare to its 2013 rivals in the crossover SUV market? 
The good news is that it is certainly competitive. With a range of 16 to 22 mpg in cities and 23 to 32 on highways, very few crossover SUVs from 2013 can offer much better ratings. 
Buick Encore
is rated between 23 and 25 for cities and 30 to 33 for highway driving, making it an attractive option. It has good reliability scores, too. Meanwhile, the
MINI Cooper Countryman
rates even better with 23 to 27 mpg in the city and 30 to 35 mpg on the open road.
However, the likes of the 2013
Toyota Highlander
Chevrolet Traverse
, and
Kia Sportage
all have lower fuel economy ratings than the Terrain. 
But what if you decide to buy a 2023 GMC Terrain? Ten years on, it still offers 26 mpg combined city-highway driving. So based on fuel economy alone, newer doesn’t mean better.

How to improve fuel efficiency for a 2013 GMC Terrain

The 2013 GMC Terrain’s gas mileage is respectable for a crossover SUV. But it’s also just an estimate. It doesn’t mean that you will actually achieve that kind of fuel economy. It also doesn’t mean you can’t do better.
Here are some tips to help you save on gas: 
  • Don’t carry unnecessary weight. Having an SUV means you have lots of extra space. But having this space doesn’t mean you need to fill it. The more weight you carry in the car, the more fuel it needs to drive. So, try to avoid using your Terrain as a storage space.
  • Watch your speed. How you drive has an impact on your fuel economy, as well. Being a speed demon is not good. Reducing your highway speeds by 5 to 10 mph can increase your fuel economy by up to 14%.
  • Avoid rush hour. Lots of us have changed the way we work since the pandemic. So if you’re able to flex your hours and keep out of traffic jams, this will also help your fuel economy. If you can’t, try to avoid excess idling and shut off your engine if it looks like you’ll be stuck for more than a minute.
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