I have a auto lpg kit installed and I am geting a milege of 10 in bangalore city and 12-13 on highway.
no maintainance cost. everything is fine
I read MR Shrini had to replace his fuel pump. I am sorry for that but my dear its not because of the lpg kit its because of the not preper installation of lpg kit.
The person who has installed the kit in your car had to put one more device(emulator) with a snake like wiring, this wirings are male female commection which will not stop your fuel pump when your car is in gas the petrol will be coming in the engine and going back to the tank through the pipe.
this device with the wiring will cost around 800(local make) and 1500(lovato make)
Please always insist on original parts.
any further enquiries feel free to ask.
sambhav