Propane, also known as liquefied petroleum gas (LPG) or autogas, has been used worldwide as a vehicle fuel for decades. It is stored as a liquid, and propane fueling infrastructure is widespread.
Also known as liquefied petroleum gas (LPG) or autogas, propane is a clean-burning, high-energy alternative fuel that's been used for decades to power light-, medium- and heavy-duty propane vehicles. Propane is a three-carbon alkane gas (C3H8). It is stored under pressure inside a tank and is a colorless, odorless liquid. As pressure is released, the liquid propane vaporizes and turns into gas that is used for combustion. An odorant, ethyl mercaptan, is added for leak detection.
Propane has a high octane rating and excellent properties for spark-ignited internal combustion engines. It is non-toxic and presents no threat to soil, surface water, or groundwater. Propane is produced as a by-product of natural gas processing and crude oil refining. It accounts for about 2% of the energy used in the United States. Of that, less than 2% is used for transportation fuel. Its main uses include home and water heating, cooking and refrigerating food, clothes drying, powering farm and industrial equipment. Rural areas without natural gas service commonly rely on propane as a residential energy source. The chemical industry uses propane as a raw material for making plastics and other compounds.
Also known as liquefied petroleum gas (LPG), propane is a domestically produced, well-established, clean-burning fuel. Using propane as a vehicle fuel increases energy security, provides convenience and performance benefits, and improves public health and the environment.
Thousands of liquefied petroleum gas (propane) fueling stations are available in the United States.
Laws and Incentives
State and federal governments enact laws and provide incentives to help build and maintain a market for propane fuel and vehicles.
Find laws and incentives for propane by state.
Alternative Fuel Data Center
Subscribe to receive our ACFC Email Newsletters
Become a member
Help guide the decisions that will impact economic development and air quality in Alabama.