Frequently Asked Questions

How many alternative fuel and hybrid vehicles are there in the U.S.?

EIA estimates that in 20111 there were nearly 11 million alternative fuel vehicles2 in the United States. This total includes nearly 10 million ethanol-flex fuel vehicles, of which about 1 million actually used E85.

EIA estimates that there are also about 2 million hybrid-gas-electric and diesel-electric vehicles.


Alternative Fuel Vehicles in Use 2011:

  Light Duty Medium Duty Heavy Duty Total
Ethanol — Flex Fuel 819,133 43,387 317 862,837
Liquid Petroleum Gas (Propane)  76,647 26,855 35,975 139,477
Natural Gas  66,147 23,473 32,030 121,650
    Compressed Natural Gas  65,980 23,343 28,891 118,214
    Liquefied Natural Gas  167 130 3,139 3,436
Electric — Battery 66,409 87 779 67,295
Hydrogen  425 1 101 527
Total 1,028,761 93,803 69,222 1,191,786

Source: Alternatives to Traditional Transportation Fuels 2011 report


Total, Light Duty Ethanol-Flex Fuel and Hybrid Vehicles 2011 :

Ethanol — Flex Fuel3 9,946,091
Hybrid Gas/Diesel-Electric 2,126,357

Source: Annual Energy Outlook 2013, Table 58, Light-Duty Vehicle Stock by Technology Type.

1.Most recent data available.

2. A vehicle designed to operate on an alternative fuel, such as electricity, ethanol, liquid petroleum gas, or natural gas.  The vehicle could be either a dedicated vehicle designed to operate exclusively on alternative fuel or a nondedicated vehicle designed to operate on alternative fuel and/or a traditional fuel. 

3. Includes all ethanol flex-fuel vehicles; most are not using E85. 

Last updated: May 16, 2013 

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