You are right Abu Bhai, I am not a fan of CNG as well, For myself I am using Corolla 2005 (SE Saloon AT) 1.6 on Petrol (till the budget permits). It give me around 9Rs. / Km. Whereas one of my friend using CNG on the same car which gives him around 6Rs./Km. So keeping in view an investment of Rs.60,000 on CNG, i prefer running on Petrol. I have used diesel car before, the annoying thing is the noice of 'zooooooommmmm' especially on highway, that is tooo irritating.