mileage of cng fitted reborn prosmatec in lahore. 60kg cylinder. 100-120km within city and around 120-140km out of city with/without ac.
petrol average is 8km/l within city and 12km/l on highways.
MANUAL reborns perform better than the above mentioned values.
You can get any simple CNG kit in your car. No lambda kit is needed for reborn. Nothing happens to the engine if you dont abuse it. Gear technology is simple and its absolutely fine to run on CNG.
BUT, if you want it to be on its toes every time you floor it, then dont go for CNG. You will have to compromise a little on that case. Apart from that, all is well.
emulator and advancer increase car's pic and response on CNG. use them. Prices can be checked from KHI market. Landirenzo is the best. Get it from any famous CNG fitter in KHI.
Plugs must be used as per civic's manual.
Honda also has its own engine oil. You can use that also. Earlier it was the same as Caltex Havoline (Black can) as both were being made by Chevron Limited. Now Honda has given the contract to some other company. I however still use Havoline in 2007 reborn and change every 3000km.
CNG installation should not make any difference on power steering.
Hope it helps.