Propane, specifically in the form of liquefied petroleum gas (LPG), is a cleaner and cheaper alternative to gasoline and diesel, yet it remains underutilized in the U.S. vehicle market. While LPG is generally less expensive, with prices often below $2 per gallon, its adoption is hindered by limited refueling infrastructure, with only about 1,238 public LPG stations compared to over 160,000 gas stations. Additionally, converting standard engines to LPG can be costly, often reaching thousands of dollars. Despite these challenges, propane has gained traction among fleet vehicles, which benefit from dedicated refueling options. The U.S. Department of Energy reports around 60,000 LPG-powered vehicles, excluding numerous forklifts. Furthermore, using propane can lead to a 13% reduction in greenhouse gas emissions compared to gasoline, and significantly lower NOx and sulfur emissions compared to diesel engines. Properly engineered propane systems also mitigate safety concerns, making it a viable option for reducing emissions and costs.