its pretty good on cng....i m using my 1.6 Ex Saloon on cng frm da day1....it has done 1lac 70000thousand kilometers and still its perfect....good pick-up wid a good mileage i.e. 100-110kms wid A/C local and 150-170kms wid A/C on motorway depending upon da quality of cng....and i hav personally driven it till 180km/h wid A/C....so its a really good xperience indeed.