The Technology One of the reasons that NGVs are a near-term pollution solution is the maturity of the technology.
Natural gas is an excellent fuel for conventional and advanced internal combustion engines.
Its simple composition, with most of the energy coming from hydrogen, makes it an environmentally superior fuel. It also exhibits a very high octane number, exceeding 130. Because of this high octane number, natural gas engines can be operated at a higher compression ratio than gasoline engines. Thus, modern fuel-injected, dedicated natural gas engines can meet or exceed the fuel economy of similar conventionally fueled vehicles. Stored in vehicles in high-pressure compressed gas cylinders.