I need experts opinion on engine oil grade for Vitz 2006 model 1000cc. The odometer is on 26k which I don't know original or tempered. I poured Total 9000 5w30 in last oil change and now I m due for change. The manual recommends only 5w30 but I m confused every one is suggesting his own oil grade 5w40, 10w40, etc...
Please suggest me oil grade keeping in mind the coming summer temperature of Lahore which exceeds 50 C.