MPG Mastery H2 Hummer's Fuel Efficiency Redefines Off-Road Performance

There's a faux central tire inflation system, and the gas mileage is unimpressive at just 12 mpg. Parking the H2 is a challenge due to its ... 30 l/100 km 7.84 US mpg 9.42 UK mpg 3.33 km/l · 15 l/100 km 15.68 US mpg 18.83 UK mpg 6.67 km/l. Hummer H2 MPG (Fuel Consumption) & Emissions data for Hummer H2 cars . Includes HUMMER H3 for HUMMER H3. Hummer H2 MPG ; Model Year, Body/Powertrain, MPG ; 2003, 2003 4dr SUV 393-hp 6.2L V8 6-sp shiftable automatic AWD w/low range, 12.83 ; With the 393-horsepower 6.2L ... Hummer H2 MPG · 2007 · 10.3 Avg MPG · 6 Vehicles · 116 Fuel-ups · 25,534 Miles Tracked; View All 2007 Hummer H2s. Best Answer. 10 to 12 mpg. Hummer H2s have horrible fuel mileage. 6 people think this is helpful. Considering that an H2 gets a paltry 13 mpg on the highway and 10 mpg in the city, it has become a lightning rod for those who feel we haven ... Its large size and powerful engine translated to abysmal fuel economy, averaging a mere 10 mpg in the city and 13 mpg on the highway. This ... With the larger engine and 6-speed transmisson, the gas mileage would improve by .7mpg (according to the dealer). I was getting about 13-14mpg on the 06 H2. The H2 Hummer on average gets 16 MPG on the highway and about 12 MPG in the city. The newer H2 Hummers get slightly better gas mileage than the ...