Hydrogen-Powered MPG H2 Hummer's Eco-Friendly Triumph

10mpg come on that's unacceptable and going to get unnecessarily expensive pretty quick with a couple fam road trips coming up. The five-cylinder was rated at an EPA-estimated 14 mpg in the city and 18 mpg on the highway, while the V8 got 13/16 mpg, respectively. Hummer ... A brand new Hummer H2 sits in the Hummer of Manhattan dealership. Despite it s fuel economy of only an estimated 13 mpg in the city and at 8 000 pounds fully ... It's pushing the limit for the H2 but it should do fine, gas mileage will probably be horrible though. I know my friends H2 without towing ... Consumption in city is 30,0 lt/100km, consumption in highway is 15,0 lt/100km and combined fuel consumption is 22,0 lt/100km according to official factory data. I spotted this Hummer H2 at the SEMA show in Las Vegas a while back. It claims to get 100 mpg with bolt on technology. Surprisingly, however, GM reports that even with a bigger engine, the H2's fuel economy is actually improved. Car and Driver calls this "the crazy part: Hummer ... H2 is slightly higher in gas (10 - 14 mpg compared to 15 - 20 mpg) - BUT FX35 is higher insurance, and probably higher maintenance - which ... When towing it dropped to a regular 7 - 9 mpg. Not the best for all around mpg. General Motors is not required to provide official H2 fuel economy ratings due ... 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.