If the car is not consuming oil the go with
SGO PREMIUM 10w40 API SG... The best oil you can use for your ride.. Otherwise you can give a try to ZIC 15w40 API SJ... If its consuming high amounts of oil then Valvoline 20w50 API SG would work real good.
Don't know but i have a strong feeling that GUARD oil is rubbish.....
And for overheating issue get a high speed fan for Radiator... Original Fan is not enough to keep the car cool in this heat....
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