[Xist]

Can You Really Run a Car on Moonshine?

Though technology exists to allow ethanol FFVs to run on any mixture of gasoline and ethanol, from pure gasoline up to 100% ethanol (E100),[12][13] North American and European flex-fuel vehicles are optimized to run on E85, a blend of 85% anhydrous ethanol fuel with 15% gasoline. This upper limit in the ethanol content is set to reduce ethanol emissions at low temperatures and to avoid cold starting problems during cold weather, at temperatures lower than 11 °C (52 °F).[14] The alcohol content is reduced during the winter in regions where temperatures fall below 0 °C (32 °F)[15] to a winter blend of E70 in the U.S.[16][17] or to E75 in Sweden[18] from November until March.[19] Brazilian flex fuel vehicles are optimized to run on any mix of E20-E25 gasoline and up to 100% hydrous ethanol fuel (E100). The Brazilian flex vehicles are built-in with a small gasoline reservoir for cold starting the engine when temperatures drop below 15 °C (59 °F).[20] An improved flex motor generation was launched in 2009 which eliminated the need for the secondary gas tank.

Flexible-fuel vehicle[Wikipedia]