Hey Shashank, Welcome to Delhi. So was hyderabad not taxing as far as petrol costs were related? Are you doing long trips in Delhi? Abt CNG, The CNG as a fuel is dry. And to lessen the burden on the engine, Sequential kits are more successful than the conventional ones. Getting a kit done and then getting it endorsed on ur (I believe) AP regd vehicle would also be huge task. . Ur vehicle maintenance and oil consumption would also increase on CNG. From purely fuel quality point of view LPG is better than CNG, but the auto LPG pumps are far too less so not an alternative at present. And the long q's at the gas station and then getting 1.5-2kg gas because of less pressure is a big irritant.