Today there are millions of so-called ‘ flex fuel vehicles’ on the road that can use fuel containing up to 85 percent ethanol (E-85).

现今，有数百万被称作混合燃料车在道路上跑着，它可以使用含85%乙醇的燃料（E-85）。

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After that, owners will be billed monthly for only the ethanol they pump into their flex-fuel vehicles.

之后，业主只要每月支付抽入他们的灵活燃料汽车的乙醇的费用。

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Under the ethanol fudge, so-called “flex-fuel” vehicles that can run (even if they never do) on E85 as well as petrol are granted a 54% bonus towards their CAFE target.

那些装有“flex-fuel”发动技术的汽车既能用E85作为动力燃料，也能用汽油作燃料，在使用乙醇燃料时，每辆车能得到54%的燃料补贴，这样做能达到cafe目标。

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One frequent question deals with Compressed Natural Gas or Liquified Natural Gas vehicles (Natural Gas Vehicles or NGV) in comparison with tri-Flex Fuel vehicles ( Gasoline, Ethanol, Methanol) vehicles.

FORBES: Governors Press Detroit To Make Natural Gas Vehicles

The government rates the fuel economy of flex-fuel vehicles at about 165% the miles per gallon (mpg) they would get on straight petrol.

ECONOMIST: Behind Detroit's sudden embrace of ethanol

These so-called flex-fuel vehicles can burn either gasoline or ethanol or almost any mixture of the two.

NPR: 'Flex-Fuel' Concept Fails to Deliver on Potential