My car is Corolla GLI 2007, engine assembly is recently changed which is purchased from shershah, Karachi, Engine condition is normal. I have poured oil of Mobil Super 10w40 semi synthetic (picture attached), which is recommended by one of my friend who is a car geek, which cost me more than a normal oil (Rs.7500)
Now when I read about engine oil recommendation in pakwheels forum so most of the senior guys recommending 5w30 or 10w30, so should I downgrade the oil in next oil change? And it's safe to downgrade from thicker to thinner? Or this grade is also good for my vehicle?? Please suggest
