Han yaar. According to my Einstein calculations, I can save about 3.5 Rupees per KM on LPG as compared to Petrol.
I think there's one reason for that- The kit that they are giving to me is a desi one made in Gujranwala. It probably doesn't have all the Goodies imported and high-end kits have. But I believe as long as a good guy does the job, smell shouldn't come!