Are Hummers good on gas?

The average gas mileage of a Hummer depends on the model, year, engine type, terrain, and driving habits. The H1 gets around 10 mpg, the H2 a low 10-12 mpg while the H3 can deliver up to 14 mpg on average. There is no big difference between gas and diesel H1s regarding gas mileage.Oct 1, 2019

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