Be careful when you are converting a petrol into a petrol and cng hybrid. At the initial phase you will feel that your fuel bills have dropped but if you know what cng does to a car’s engine then you won’t make this mistake ever again. Once you start running your car dry that is on cng it will not give you issues at the initial phase but over time it damages the engine and you will feel a loss of power and pickup. That is why it is advised to run your car on petrol for 2-3 kilometres before switching to cng. But at the end it will still damage your car so be careful.