if your car is less than 80K on odometer then go for synthetic
cheaper solution is Caltex Synthetic engine oil from a reputed caltex pump..
Mobil 1 5w50, equally good for extreme winters and summers, is no doubt the world leader in quality..a bit expensive but you can use it at least for 12000-15000 KM with a better air and oil filter..
if your odo is more than 1 Lack then go for semi synthetic or mineral oil
like caltex 10w30 in winters and caltex 20w50 (non CNG)in summers.. both are a cheap solution.. they last till 4500-5000 KM easily