got a mehran 2006 vx on petrol. no cng. fuel consumption is rocking me. what are my options?

1. Should i install cng kit OR
2. EFI kit for petrol

basically i m affraid of cng kit bursting stories (i ve kinda phobia bout this) thats why m reluctant for the cng. so my question is, eif conversion is offered at pindi / islamabad for 30 to 35 k. is that worth? or off-the-market kit wont do n e gud?

thanks in advance.