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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.

Reported MPG

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If you are not a TrueDelta member, you can see only five Hummer H3 MPG averages for each powertrain. Log in or join us to see them all.

Hummer H3 Gas Mileage

Year Body/Powertrain 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
2009 4dr SUV 295-horsepower 5.3L V8
4-speed automatic AWD w/low range
flat light hvy 0 100 0 0 N/A 20.0
2009 4dr SUV 295-horsepower 5.3L V8
4-speed automatic AWD w/low range
flat light hvy 0 100 0 0 20.0  
  Averages flat light hvy 0 100 0 0 20.0
With the 295-horsepower 5.3L V8 engine, 4-speed automatic transmission, and all-wheel drive w/low range, 2009 Hummer H3 fuel economy has been averaging 20.0 MPG (miles per gallon).

The 2009 Hummer H3s in this analysis were driven mostly in the city (about 100 percent of the miles driven). The rest of the miles were in heavy traffic (0 percent), in the suburbs (0 percent), and on the highway at an average speed of miles per hour (0 percent).

In addition the average 2009 Hummer H3 in this analysis was driven on flat terrain with a light foot and the AC on most or all of the time.
 
Year Body/Powertrain 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
2008 4dr SUV 242-horsepower 3.7L I5
5-speed manual AWD w/low range
hills light light 0 50 0 50 55 19.5
2008 4dr SUV 242-horsepower 3.7L I5
5-speed manual AWD w/low range
hills light light 0 50 0 50 55 19.5  
  Averages hills light light 0 50 0 50 55 19.5
With the 242-horsepower 3.7L I5 engine, 5-speed manual transmission, and all-wheel drive w/low range, the 2008 Hummer H3 has been averaging 19.5 MPG (miles per gallon).

The 2008 Hummer H3s in this analysis were driven mostly in the city (about 50 percent of the miles driven). The rest of the miles were on the highway at an average speed of 55 miles per hour (50 percent), in heavy traffic (0 percent), and in the suburbs (0 percent).

In addition the average 2008 Hummer H3 in this analysis was driven on hilly terrain with a light foot and the AC on only some of the time.
 
Year Body/Powertrain 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
2008 4dr SUV 242-horsepower 3.7L I5
4-speed automatic AWD w/low range
flat med none 10 30 30 30 70 15.8
  flat light none 0 20 0 80 65 16.7
  hills light none 0 100 0 0 N/A 17.3
  flat light light 0 30 30 40 60 16.5
  hills light none 0 100 0 0 N/A 16.4
2008 4dr SUV 242-horsepower 3.7L I5
4-speed automatic AWD w/low range
flat light none 2 56 12 30 65 16.5  
  Averages flat light none 2 56 12 30 65 16.5
With the 242-horsepower 3.7L I5 engine, 4-speed automatic transmission, and all-wheel drive w/low range, 2008 Hummer H3 gas mileage has been averaging 16.5 MPG (miles per gallon).

The 2008 Hummer H3s in this analysis were driven mostly in the city (about 56 percent of the miles driven). The rest of the miles were on the highway at an average speed of 65 miles per hour (30 percent), in the suburbs (12 percent), and in heavy traffic (2 percent).

In addition the average 2008 Hummer H3 in this analysis was driven on flat terrain with a light foot and the AC not used at all.
 
Year Body/Powertrain 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
2007 4dr SUV 242-horsepower 3.7L I5
5-speed manual AWD w/low range
hills med hvy 11 11 22 56 70 18.0
  flat light none 22 22 25 30 60 18.0
2007 4dr SUV 242-horsepower 3.7L I5
5-speed manual AWD w/low range
hills med light 17 17 24 43 65 18.0  
  Averages hills med light 17 17 24 43 65 18.0
With the 242-horsepower 3.7L I5 engine, 5-speed manual transmission, and all-wheel drive w/low range, 2007 Hummer H3 fuel economy has been averaging 18.0 MPG (miles per gallon).

The 2007 Hummer H3s in this analysis were driven mostly on the highway at an average speed of 65 miles per hour (about 43 percent of the miles driven). The rest of the miles were in the suburbs (24 percent), in heavy traffic (17 percent), and in the city (17 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.
 
Year Body/Powertrain 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
2007 4dr SUV 242-horsepower 3.7L I5
4-speed automatic AWD w/low range
flat med hvy 30 20 20 30 60 15.8
  flat med hvy 30 20 20 30 60 15.4
  hills light none 5 20 50 25 60 15.0
  flat light light 3 7 90 0 N/A 15.0
  hills light light 5 20 50 25 60 15.0
2007 4dr SUV 242-horsepower 3.7L I5
4-speed automatic AWD w/low range
flat light light 15 17 46 22 60 15.2  
  Averages flat light light 15 17 46 22 60 15.2
With the 242-horsepower 3.7L I5 engine, 4-speed automatic transmission, and all-wheel drive w/low range, the 2007 Hummer H3 has been averaging 15.2 MPG (miles per gallon).

The 2007 Hummer H3s in this analysis were driven mostly in the suburbs (about 46 percent of the miles driven). The rest of the miles were on the highway at an average speed of 60 miles per hour (22 percent), in the city (17 percent), and in heavy traffic (15 percent).

In addition the average 2007 Hummer H3 in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.
 
Year Body/Powertrain 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
2006 4dr SUV 220-horsepower 3.5L I5
5-speed manual AWD w/low range
flat med light 0 60 0 40 75 15.0
  flat med light 0 10 0 90 75 17.0
  flat light none 0 50 0 50 60 17.0
  flat med light 0 95 0 5 75 15.0
  flat light none 0 100 0 0 N/A 15.0
2006 4dr SUV 220-horsepower 3.5L I5
5-speed manual AWD w/low range
flat med none 0 63 0 37 71 15.8  
  Averages flat med none 0 63 0 37 71 15.8
With the 242-horsepower 3.7L I5 engine, 5-speed manual transmission, and all-wheel drive w/low range, 2006 Hummer H3 gas mileage has been averaging 15.8 MPG (miles per gallon).

The 2006 Hummer H3s in this analysis were driven mostly in the city (about 63 percent of the miles driven). The rest of the miles were on the highway at an average speed of 71 miles per hour (37 percent), in heavy traffic (0 percent), and in the suburbs (0 percent).

In addition the average 2006 Hummer H3 in this analysis was driven on flat terrain with a medium foot and the AC not used at all.
 
Year Body/Powertrain 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
2006 4dr SUV 220-horsepower 3.5L I5
4-speed automatic AWD w/low range
flat med light 5 10 20 65 75 17.0
  flat light light 5 10 10 75 60 18.0
  flat light light 0 0 100 0 N/A 16.0
  hills lead light 10 10 40 40 55 17.2
  flat light hvy 0 20 10 70 60 15.0
2006 4dr SUV 220-horsepower 3.5L I5
4-speed automatic AWD w/low range
flat med light 4 10 36 50 63 16.6  
  Averages flat med light 4 10 36 50 63 16.6
With the 242-horsepower 3.7L I5 engine, 4-speed automatic transmission, and all-wheel drive w/low range, 2006 Hummer H3 fuel economy has been averaging 16.6 MPG (miles per gallon).

The 2006 Hummer H3s in this analysis were driven mostly on the highway at an average speed of 63 miles per hour (about 50 percent of the miles driven). The rest of the miles were in the suburbs (36 percent), in the city (10 percent), and in heavy traffic (4 percent).

In addition the average 2006 Hummer H3 in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.

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What Our Members Are Saying about the Real Hummer H3 MPG

Hummer H3 Fuel Economy: Cons
Year Body/Powertrain Comment
2006 4dr SUV 242-hp 3.7L I5 4-sp 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.
2006 4dr SUV 242-hp 3.7L I5 4-sp automatic AWD w/low range It could be better... Why no medium-duty diesel?