Autogas is the common name for liquefied petroleum gas (LPG) when
it is used as a fuel in internal combustion engines in vehicles as
well as in stationary applications such as generators. It is a
mixture of propane and butane.
Autogas is widely used as a green fuel as it decreases exhaust
emissions. In particular, it reduces CO2 emissions by around *5%
compared to petrol. One litre of petrol produces 2.3 kg of CO2 when
burnt, whereas the equivalent amount of autogas produces only 1.5
kg of CO2 when burnt.It has an octane rating (MON/RON) that is
between *0 and **0 and an energy content (higher heating value—HHV)
that is between *5.5 megajoules per litre (for pure propane) and
*8.7 megajoules per litre (for pure butane) depending upon the
actual fuel.
