dont come in rumours that city vario or civic not compatible with cng bla bla bla...
actually cng can be fit in almost all of major car brands available in pakistan ,all cars can be converted & give good performance on cng ONLY & ONLY IF DONE BY QUALIFIED & GOOD TECHNICIANS & EXPERTS.
for you i recommend , close your eyes & go for cng soon for your Civic i-Vtec Prosmatec 2008, you are alreday late in queue
BUT GO TO CLASSIC CNG,GULSHAN ,BLOCK-3,KARACHI & only install landirenzo kit & accesories. get 60 kg cylinder, if you can accomodate with boot space then try to get 2 cylinders ,each of 60 kg
in my opinion wheter it is FFitted /outsiders fitted , it depends on settings how well they install
i have personally installed cng in various cars from outside not FF & also drive lots of F/F cng infact drove XLI/GLI with F/F cng too, no difference if it i sproperly installed
actually unfortunately on every streets who can fit cng kit claims to be cng expert but infact they do mess with cng stuffs ,due to which cng gives problem
due to such non technical mecahnics, people think that cng is not good, cng is fault bla bla bla
please try to understand it is just fuel type, not rocket science only required good installation
even before 20 years, before use of cng in pakistan, what there was no problem in petrol cars at that time? any bad mantainance , poorly installation etc. etc. caus eproblem,
so not to blaim for cng itself, it is fault of those who misconfigure it.