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The Brazilian Fiat Siena Tetrafuel 1.4 is the first bi-fuel car that runs with natural gas (CNG) alternating automatically with any of the typical fue
The Brazilian Fiat Siena Tetrafuel 1.4 is the first bi-fuel car that runs with natural gas (CNG) alternating automatically with any of the typical fuel blends used in flexible-fuel vehicles, pure gasoline, or gasohol E25, or just ethanol (E100). Shown below are the CNG storage tanks in the trunk.
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Multifuel automobiles, from several manufacturers, popularly known as "flex" autos, that run on any blend of ethanol and gasoline
Multifuel automobiles, from several manufacturers, popularly known as "flex" autos, that run on any blend of ethanol and gasoline