Depending on your engine there is a large choice of type of equipment.
Eurogas Advanced System.
This is a self-learning system that uses slightly older technology than the other two types available and is most suited to older vehicles. It does, however, feature a self-learning capability which learns the driver’s habits and technique of driving to improve the performance of the vehicle. Typical mpg performance is 20% lower than the petrol equivalent.
Injected Gas System.
This is one of the most advanced systems available and is most suitable for modern petrol engines with electronic fuel injection and catalytic convertor. It returns a similar efficiency as the EAS kit, but is a lot more reliable on modern engines. This system also has a learning capability and also takes into account throttle position, gas temperature, lambda ratio, intake manifold absolute pressure, engine temperature, engine rpm and petrol injector signals to maximise performance.
Sequential Gas Injection System.
This is the latest kit to become available and it is again designed for modern engines with electronic fuel injection and catalytic convertors. This kit is the most expensive and, according to the manufacturers of the equipment, the fuel economy is much improved with around a 2% reduction in mpg over a petrol model so the extra cost will soon be recouped. However, this kit is still in its early days so other models other than the manufacturers own are not yet available. The liquid is injected just above the cylinder and is introduced via elecronically controlled valves giving a higher accuracy and therefore improved mpg performance with no loss of power or performance.