@shirazkhan. It is original Landi Ranzo and STAP advancer, emulator. Fitting done by experts. You can get more milage from CNG by driving the car gently and avoid congested places. The fast driving on crowded road is not only dangerous but also consumes more fuel as you have to do a lot of breaking. Keep everything, tyres, engine, fluids in top condition.
The last fill gave 170kms as the gas was filled less. But when I have a good fill the 55 kg cylinder easily gives 190 and sometimes it touches 200+ kms.