39. Natural gas for vehicles has higher octane number than gasoline (125 vs. 90), what provides combustion without self-ignition, even in engines of higher compression and efficiency.
40. Furthermore, combustion is total, because the mixture between NGV/CNG and air is perfect at any ambient temperature.
41. The oil that lubricates the engine is less contaminated if natural gas is employed, and intervals between oil changes are twice as long.
42. There are no sediments and the spark plugs are kept clean. The walls of the engine cylinders are not washed, what results in better and more effective lubrication.
43. Combustion gases are not corrosive. By not damaging metals, the life of the exhaust pipe and silencers is longer.
44. The gaseous nature of the fuel eliminates the scanning actions in the cylinders during fast acceleration periods, with the advantage of reducing the corrosion of metal surfaces.
45. The engine presents great performance flexibility during accelerations without irregularities or backfires, even at low direct speed.
46. Converted vehicles may switch from using NGV/CNG to gasoline by simply pushing a button or turning a knob while driving.
47. NGV-gasoline bifuel system doubles the car’s driving range.
48. Natural gas vehicles operate in all terrains, even across mountains. In this sense, a truck –with a 37-tonnes load- drove above 4,800 meters high in the Peruvian Andes in May 2008.
49. NGV/CNG works fine under any climate condition. Since the fuel does not freeze –not even at low temperatures- the vehicle will always be ready to be used. NGV/CNG components are tested at -40°C during its approval process. Natural gas only liquefies at 165 °C.
50. What is more, the speeds it may reach are similar to racing cars’ speeds. A biogas Audi A4 entered the Guinness Book of Records by achieving 364.6 km/h in April 2009, thus becoming the fastest NGV/CNG-driven car of the world. The milestone was reached on the Formula One Nürburgring race track in Germany.
