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Hummer H3 Fuel Economy (L/100km)

L/100km Number of Vehicles
12 liters per 100 kilometers 1 vehicles
13 liters per 100 kilometers 2 vehicles
14 liters per 100 kilometers 0 vehicles
15 liters per 100 kilometers 2 vehicles
16 liters per 100 kilometers 4 vehicles
Model Year Body/Powertrain L/100km  
2007 2007 4dr SUV 242-hp 3.7L I5 5-sp manual AWD w/low range 13.1
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With the 178 kilowatts 3.7L I5 engine, 5-speed manual transmission, and all-wheel drive w/low range, the 2007 Hummer H3 has been averaging 13.1 L/100km (liters per 100 kilometers).

The 2007 Hummer H3s in this analysis were driven mostly on the highway at an average speed of 65 kilometers per hour (about 43 percent of the kilometers driven). The rest of the kilometers were in the city (16.5 percent), in heavy traffic (16.5 percent), and in the suburbs (0 percent).

In addition, the average 2007 Hummer H3 in this analysis was driven on hilly terrain with a medium foot and the AC on only some of the time.
2007 2007 4dr SUV 242-hp 3.7L I5 4-sp automatic AWD w/low range 15.01
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What Our Members Are Saying about the Real Gas Mileage of the 2007 Hummer H3

2007 Hummer H3 Real Gas Mileage: Cons
YearBody/PowertrainComment
2006 4dr SUV 220-horsepower 3.5L I5
4-speed automatic AWD w/low range
It could be better... Why no medium-duty diesel? see full Hummer H3 review
2006 4dr SUV 220-horsepower 3.5L I5
4-speed automatic AWD w/low range
I knew what I was getting into when I bought it. But come on, 14.8mg on the freeway? I would have bought an H2 if I knew that was going to happen. You have to drive like a grandpa to achieve 17mpg. i.e. - under 65 on the freeway. see full Hummer H3 review
 

2007 Hummer H3 Gas Mileage (L/100km)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Hummer H3's real-world L/100km based on how and where you drive a car.