the one refering to temperature guage in the earlier messages, please be informed that it is fuel guage. temperature guage is on the left side of the meter.
i've 2006 alto, doing very good on a/c both with cng and petrol. the pick up of your car depends on the right combination of the air and fuel intake. the mixture of air and cng has to do the work. a good understanding cng mechanic can set the mixture combination. daily i travel almost 125 km to my office and bach to home. its 150000 plus done but still going very fine. interior of the car is comparatively better than cuore and its shape is far better than the sucking santro. i travel on motorway with 120 easyily. its fuel economy is 170 km full 55 litre cylinder local and 210 km full 55 litre cylinder long route. with a/c 20 km lesser.
i love my alto.