I have been using PSO products exclusively for more than 5 years now.
Never had any issues.
All other local companies such as Shell and Total get their oils blended by PSO!
PSO Carient oils will never fail even if you overrun the oil change interval. Trust me when I tell you i got my oil changed at 9500 km instead of 5000 once!
That to me is of significant importance since it indicates good composition of the oil and the additives are of good quality. Some oils may start breaking up and burning.after some miles.
My mother in law's GLI AUTO 2016 is also on PSO because the genuine toyota oil was burning up before the 5k oil change interval. Also the engine's timing chain is not making any noise at startup.
Recommended from an old user of PSO products.