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Hummer H3 Fuel Economy Data

4dr SUV 242-hp 3.7L I5 4-sp automatic AWD w/low range

flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
flat med hvy 30 20 20 30 60 15.800
flat med hvy 30 20 20 30 60 15.400
flat med none 20 80 0 0 N/A 14.800
flat v.lt none 18 21 25 36 60 19.800
hills light none 5 20 50 25 60 15.000
flat light light 3 7 90 0 N/A 15.000
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hills light light 5 20 50 25 60 15.000

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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 (MPG)

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 MPG based on how and where you drive a car.