As a side note, most gasoline vehicles are capable of operating on gasoline/ethanol blends with up to 10% ethanol. For more information on lower percentage ethanol blends, please see the Clean Cities site for information on fuel blends.
For more information about ethanol vehicles, visit the Ethanol Vehicles page on the Alternative Fuels Data Center or go to the National Ethanol Vehicle Coalition.
All E85-capable vehicles should be badged with a manufacturer's fuel door decal, such as this one on a Nissan Titan FFV.
Also, make sure you check out the 2006 Flexible Fuel Vehicle Purchasing Guide (PDF 896 KB) (a PDF is available through the NEVC's Web site). The guide provides background information and details about E85 as a fuel and provides descriptions of flexible fuel vehicle.DOE’s Alternative Fuels Data Center