Obtaining a real favorable result of combustion of gas in a car engine to the surrounding environment compared to the combustion of leaded petrol and diesel fuel it is related to the chemical-physical properties associated with LPG, namely:
It is a combination of propane and butane, or hydrocarbons having any straight molecular structure, does not contain impurities and additives
the engine is given within the vapor phase, which allows a superior combustion process
does not contain impurities that happen to be a product of using up solids.