LPG
Liquified Petroleum Gas, a.k.a. Propane is a conglomeration of fuels, stored under slight pressure, (120psi) in a liquid form. Propane has been successfully used as a motor fuel for generations. Propane was used primarily on the farm and for farm equipment. When LPG was taxed as a motor fuel in the 1960's, its use crumbled to almost nothing in the United States. LPG is used widely throughout Canada and Australia.
Propane is available at almost every truck stop, Nation wide. LPG is a great fuel because it is kind of like recycling. Propane is comprised mainly of the tail ends of the petroleum cracking process. Combining all these leftovers into LPG for use as a motor fuel is great because the emissions of a vehicle burning propane are cleaner than the emissions of using either gasoline or diesel fuel. Propane requires its own, separate fuel system. LPG is not compatible with any other fuel and must be stored on its own. So, even though LPG is better than gasoline for many reasons, it is a dead end fuel because its use is not leading to anything better. We also still have more valuable uses for petroleum than to burn it as any fuel we can make from it.
Save our petroleum for durable goods that can be recycled again and again, each time building more wealth for our economy. It is time to break free from the wealth depleting uses of oil that are poisoning our air and water as they are burnt.