Interest in the efficient utilization of gaseous fuel resources for the production of power using conventional internal combustion engines, has been increasing worldwide in view of the inevitable declining resources of petroleum and projected limitations on the availability of refined liquid fuels, particularly those of the right quality. This is in contrast to statements made that the proven reserves of natural gas are increasing1 and that there are potentially enormous reserves of natural gas2 that can be utilized as fuels in engine applications. Moreover, there is increased perceived availability of other forms of gaseous fuels such as liquid petroleum gases, gas fuel mixtures produced from the processing and upgrading of various fossil fuel resources such as coal, oil sands and shales and from the processing of organic and vegetable wastes in the form of bio-gas.