If you've been considering the purchase of a 2012 Honda Civic Natural Gas, now might be the time to sign on the dotted line.

Honda, in conjunction with Clean Energy, is offering a $3,000 fuel card for the purchase of natural gas at any of Clean Energy's natural gas filling stations.

When natural gas already costs around $2 per gallon less than gasoline, that's a lot of free miles. Honda says that could be enough for two or three years of free fuel driving--and of course, the 31 mpg Civic Natural Gas offers plenty of other benefits too.

Not only are emissions from natural gas vehicles lower than those of other fuels, but most of the natural gas used in the U.S. is domestically produced--reducing those financial and political worries over foreign energy.

As for the gas-powered Civic itself, it uses a modified version of the standard Civic's 1.8-liter engine, producing 110 horsepower and 106 lb-ft of torque.

Range is only around 200 miles too, and that 31 mpg figure is just short of the gasoline Civic's 32 mpg--and a whole 13 mpg behind the 2012 Honda Civic Hybrid, which also costs less to buy, at $24,050 versus $26,155.

2012 Honda Civic Natural Gas first drive

That said, with $3,000 of free, cheaper fuel, plus increasing governmental support for natural gas, and the gas Civic starts to look more attractive.

Californian Civic Natural Gas buyers will also have HOV lane access from March 2, 2014 through January 1, 2015, making commuting easier, as well as cheaper.

You can find a full list of Clean Energy's filling stations on its website. Free fuel cards are available only at participating dealers, and while stocks last...

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