2009 Hummer H2 & 2010 H3 E85 Flex Fuel Engines

2009 H2 and H2 SUT - first production E85-capable Hummers!
As my friends at Autoblog like to say, it's official. GM has confirmed plans to offer all Hummers with biofuel-capable engine options. According to Automotive News, a Hummer official confirms that the 2009 H2 and H2 SUT are equipped with flex-fuel engines capable of running on gasoline or ethanol, making them the first such Hummers available. The 2010 Hummer H3 will be offered with a flex-fuel version of GM's direct injection 3.6L V-6 and we've heard plenty of rumblings regarding diesel Hummers too. GM is also looking at "clean diesel" engines using extensive computer based engine controls.

Currently, the Hummer H3 is offered with a five-cylinder gasoline engine and a 5.3 liter small-block V8, both of which struggle to get fuel mileage in the mid-to-high teens. The H2 is available only with a larger 6.2 liter V8, which, as you can probably surmise, offers 12 to 13 mpg fuel economy, and it would use even more fuel if it were running on ethanol. Emissions would probably be improved, but we're still talking about lots of fuel being burned here. We'll be on the lookout for more information on the biofuel capabilities of the Hummer brand, but it looks like GM is making strides in the right direction in getting away from petroleum based fuels and looking towards the future.