The Hummer H2's fuel economy ranks as one of the worst of any consumer automobile, with reviewers reporting the vehicle gets around 8-10 miles per gallon in the city and 13 mpg on the highway. Poor maintenance can degrade the mileage even further, making the Hummer an extremely costly vehicle to drive.
Because of the H2's gross vehicle weight rating, the manufacturer is not required to publish official fuel economy figures for the vehicle. Testing under various driving conditions has produced fuel economy measurements as high as 12.4 miles per gallon under ideal circumstances, considerably below that of most passenger vehicles and well below the increasing Corporate Average Fuel Economy, or CAFE, standards put in place by the government.
During its production, the Hummer H2 appealed to customers despite its dismal fuel consumption. It was a unique vehicle that changed the way SUVs were made because it offered more power and comfort than any other vehicle on the road at the time of its introduction. However, as time went on and fuel prices rose, the Hummer soon lost its appeal. The last Hummer H2 was produced in 2009.