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 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.
CNG generally creates fewer smog-related tailpipe emissions than gasoline, and can reduce tailpipe GHGs by about 20%.