we have a Corolla 2010 Xli which is driven over 110k kms till now in Karachi - it was a MNC car and was fed with Toyota's 20/50 since the day it was born in Indus's factory. since after 95k km, we have shifted to Shell's red pack 20/50, till now, car is as silent as if engine is not started and we need to touch the bonnet to feel the started engine. not an issue, we overthink alot. oil must be genuine and not fake, it fulfills the purpose very well.