Does Shell Petrol is good for cars Engine

advice.

Santro Xing 2007 many fitment centers have recommended me conventional kit as it will suffice the requirement in the conventional kit we have open loop and closed loop system after comparison i found closed loop is more smart as it will have less impact on performance and not needed frequent manual tuning I have been recommended for the brand Mijo which will consist stepper motor to control CNG and Lamaba for feedback and TAP Pls suggest what are the drawbacks of having motor to control CNG I also checked Kit from other companies like Lovato, Tomasetto but end of the day i found these companies do not have any control on distributors or fitter everyone will make their own success story and try to convince the customer

chennai...when am i goung to get.

help.
Looking out in Noida sector 27

model 2011