although a lot of factors should be considered when deciding the oil for a car, like, fuel type (cng, petrol, diesel), driving conditions, temprature etc etc... i'd assume the car to be relatively new (less then 100,000kms) and petrol/cng.
10w30 havoline formula should be good enough for use in quetta in summers. whats the minimum temp there? -10 or so? if yes, the above oil will work fine. take a look at these charts...