After reading most of the reviews about altos consumption i m feeling myself very lucky as my 2005 alto 90K driven gives me 170+ in a cylinder of CNG and 17+ km/l of petrol on highways. I agree that alto gives better average on CNG but as per my experience its pretty good on petrol also. Get ur car tunned and oil change after every 3k, use good quality oil, recommended tyres but i totally disagree that it ll ever give u 18kms in city rather if u b able to get 13kms in city it ll b an achievment
@ accord7362 i dont think that 60 km/h in 5th gear is a plausable speed.