absolutely normal for an alto. although a car performs best at NOT (normal operating temperature) when its cold the needle goes dowm coz there was less load on the engine while coming down. though its a silly thing , the car should maintain NOT. ive experienced the same.in winters if I drive on highways then the temperature drops. doesn't do the same in summers. cold air hits the radiator. dissipates heat and temp drops. maybe we both haven't put the right coolant mixture. my car's radiator has coolant only no water. or maybe thermostat needs replacement. but observing the same phenomenon since day one. car is a 2007 model and with me since brand new
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