The energy content of ethanol is about 33% less than pure gasoline & Flex-fuel vehicles

Independent statistics & analysis US Energy Information Administration said, (https://www.eia.gov)

The energy content of ethanol is about 33% less than pure gasoline. The impact of fuel ethanol on vehicle fuel economy varies depending on the amount of denaturant that is added to the ethanol. The energy content of denaturant is about equal to the energy content of pure gasoline. In general, vehicle fuel economy may decrease by about 3% when using E10 relative to gasoline that does not contain fuel ethanol.

 

Most of the gasoline now sold in the United States contains some ethanol. Most of ethanol blending into U.S. motor gasoline occurs to meet the requirements of the 1990 Clean Air Act (RFG Fuel) and the Renewable Fuel Standard set forth in the Energy Independence and Security Act of 2007. The U.S. Environmental Protection Agency (EPA) administers the requirements with the Renewable Fuel Standard Program.

There are three general categories of ethanol-gasoline blends: E10, E15, and E85. E10 is gasoline with 10% ethanol content. E15 is gasoline with 15% ethanol content, and E85 is a fuel that may contain up to 85% fuel ethanol. The ethanol content of most of the motor gasoline sold in the United States does not exceed 10% by volume. Most motor gasoline with more than 10% fuel ethanol content is sold in the Midwest where most ethanol production capacity is located. Gasoline dispensing pumps generally indicate the fuel ethanol content of the gasoline.

All gasoline engine vehicles can use E10. Currently, only flex-fuel and light-duty vehicles with a model year of 2001 or newer are approved by the EPA to use E15. Flex-fuel vehicles can use any ethanol-gasoline blends up to E85.

Flexible-fuel vehicles

Flexible-fuel vehicles in the United States are the second largest flex-fuel fleet in the world after Brazil, and there were about 17.4 million flex-fuel cars and light trucks in operation by the end of 2014. Despite the growing fleet of E85 flex-fuel vehicles, actual use of ethanol fuel is limited due to the lack of E85 refueling infrastructure and also because many American flex-fuel car owners were not aware they owned an E85 flex-fuel vehicle. Flex-fuel vehicles are common in the Midwest, where corn is a major crop and is the primary feedstock for ethanol fuel production. Also the U.S. government has been using flex-fuel vehicles for many years.

U.S. flex-fuel vehicles are optimized to run on a maximum blend of 15% gasoline with 85% anhydrous ethanol (called E85 fuel). This 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). The alcohol content is reduced during the winter in regions where temperatures fall below 0 °C (32 °F) to a winter blend of E70. (credit: wikipedia.org )

List of currently produced flexible-fuel vehicles

Audi
Model Engine Model Years
A4 2.0L 2013-
A5 2.0L 2013-
Q5 2.0L 2013-

Chrysler Corporation
Model Engine Model Years
200 2.4L 2015-
200, Avenger 3.6L 2011-
Avenger 2.7L 2008-2010
300, Charger 3.6L 2011-
Aspen 4.7L 2007-2009
Sebring sedan and convertible 2.7L 2003-2010
Town and Country, Grand Caravan 3.6L 2011-
Town and Country, Grand Caravan 3.3L 2008-2010
Town and Country, Voyager, Caravan/Grand Caravan 3.3L 1998-2003
Challenger 3.6L 2011
Dart 2.0L 2013-
Durango 3.6L 2011-
Durango 4.7L 2006-2010
Ram 1500 3.6L 2013-
Ram 1500 4.7L 2004-2013
Stratus sedan 2.7L 2003-2006
Cherokee 2.4L 2015-
Commander 4.7L 2007-2009
Grand Cherokee 3.6L 2011-
Grand Cherokee 4.7L 2007-2009
Renegade (BU) FWD 2.4L 2015-

Ford Motor Company
Model Engine Model Years
Crown Victoria 4.6L 2006-2011
E-Series 4.6L 2009-2014
E-Series 5.4L 2009-2014
Escape, Mariner 3.0L 2010-2012
Expedition, Navigator 5.4L 2009-2014
Explorer 3.5L non-turbo 2013-
Explorer, Mountaineer 4.0L 2002-2005
Explorer Sport Trac 4.0L 2004-2005
F-150 3.5L non-turbo 2015-
F-150 3.7L 2011-2014
F-150 5.0L 2011-
F-150 5.4L 2006-2010
Focus 2.0L non-turbo 2012-
Fusion, Milan 3.0L 2010-2012
Ranger 3.0L 1998-2003
Super Duty 6.2L 2011-
Taurus 3.5L non-turbo 2013-
Taurus 3.0L OHV 1996-2006
Transit 3.7L 2015-
Town Car 4.6L 2006-2011
Grand Marquis 4.6L 2007-2011
Sable 3.0L OHV 2002-2004

General Motors
Model Engine Model Years
LaCrosse 3.6L 2012-2016
Lucerne 3.9L 2009-2012
Regal 2.0L turbocharged (not GS) 2011-2013
Regal 2.4L w/o eAssist 2012
Verano 2.4L 2012-2013
ATS 3.6L 2013
Escalade 6.2L 2012-2014
SRX 3.6L 2012-2013
Avalanche 4.8L 2010
Avalanche 6.2L 2009-2010
Avalanche 5.3L 2005-2013
Captiva Sport 2.4L 2013-2015
Equinox, Terrain 3.6L 2013-2014
Equinox, Terrain 2.4L 2012-
Equinox, Terrain 3.0L 2011-2012
Express, Savana 4.8L 2010-
Express, Savana 6.0L 2007-
Express, Savana 5.3L 2007-
HHR 2.2L 2009-2011
HHR 2.4L 2009-2011
Impala 3.6L 2012-
Impala 3.9L 2008-2011
Impala 3.5L 2006-2011
Malibu 2.4L (fleet only) 2010-2012
Monte Carlo 3.9L 2006-2007
S-10, Sonoma, Isuzu Hombre 2.2L 2000-2002
Silverado, Sierra 4.3L 2014-
Silverado, Sierra 4.8L 2010-2013
Silverado, Sierra 5.3L 2003-
Silverado, Sierra 6.2L 2009-2013
Suburban, Yukon XL 5.3L 2002-
Tahoe, Yukon 6.2L 2009-2013
Tahoe, Yukon 5.3L 2002-
Uplander, Montana, Terraza, Relay 3.9L 2007-2008
Hummer H2 6.2L 2009
9-5 2.0 turbocharged 2011

Jaguar Land Rover
Model Engine Model Years
XF 3.0L 2014
XF 5.0L 2013-
XJ 3.0L 2013-
XJ 5.0L 2013-
Range Rover 3.0L 2014
Range Rover 5.0L 2014-
Range Rover Sport 3.0L 2014
Range Rover Sport 5.0L 2014-
Mazda Motor Corporation
Model Engine Model Years
Tribute 3.0L 2009-2011
B-Series 3.0L 1999-2003

Mercedes-Benz
Model Engine Model Years
C-Class W203 2.5L 2007
C-Class W203 2.6L 2005
C-Class W203 3.2L 2003-2005
C-Class W204 3.5L 2012-2014
C-Class W204 3.0L 2008-2012
E-Class W212 3.5L 2012-
CLA-Class 4MATIC 2.0L 2015-
GLA-Class 4MATIC 2.0L 2015-
ML-Class W166 3.5L 2012-

Nissan Motor
Model Engine Model Years
Armada 5.6L 2007-
Titan 5.6L 2005-
Toyota
Model Engine Model Years
Sequoia 5.7L 2009-
Tundra 5.7L 2009-

source:

https://en.wikipedia.org/wiki/Flexible-fuel_vehicles_in_the_United_States