Guyz to clear the confusion... plz note down that CNG IS NOT POSSIBLE FOR BOTH 1.0L and 1.3L FWD VITZ.....The reason is that both of them have a CVT-i transmission which can not at all go along with CNG.... still if someone of u ppl do want to install CNG then u are inviting a big big ''phakki''
As far as the milage is concerned i have studied alot many threads about 1.0L Vitz + Belta 06/07/08 milage and now i do have a personal experience of it aswell....
Vitz 1.0L (1KR-FE engine block) Milage
15-16 km/l in city without AC
18-19 km/l on highway without AC
AC can bring down avge 2 km/l so it will be 13-14 for city and 16-17 for highway...
so guyz if u are getting below than this than do get ur ride checked/tuned...