Can ethanol fuel be used in any vehicle?

Response:

Gasoline-ethanol blends containing up to 10% volume ethanol may be used in any vehicle. The addition of ethanol boosts octane and, because it is an oxygenate, ethanol contributes to a more complete fuel combustion resulting in reduced emissions of carbon monoxide and other ozone-forming emissions. All major auto manufacturers approve the use of up to 10% volume ethanol.

In fact, some manufacturers, such as General Motors, Chrysler, Ford, Nissan, Range Rover, and Suzuki recommend the use of oxygenated fuels and/or reformulated gasoline for their clean burning characteristics. Blends above 10% volume are not approved by the auto manufacturers or the EPA for use in standard gasoline engine vehicles.

The Energy Policy Act of 1992 also recognizes E85 (a blend of 85% ethanol and 15% unleaded gasoline) as an alternative fuel. In order to operate on E85, vehicles need to be compatible with alcohol use. The conversion cost to make FFVs compatible with E85 typically includes upgrades to the fuel system components, the addition of a fuel sensor, and reprogramming the EPOM (computer chip) in the ECM/PCM (electronic control module/power train control module).