The old wives tale of hot weather or driving hard.....
The car has oil thermostat so oil gets as hot as it needs to be so making oil thicker actually stops it cooling properly ,the system is compromised.
I don't think there are any situations in modern cars where a different oil grad ed other than recommended is justified.
Others have luck with NUlon.
I use Penrite 10 Tenths of correct grade in the T6 after always using Penrite syn in my old 5cyl cars.
It seems to be much better in that it has more better additives , it uses less oil now (the T6 use some oil) sounds better.
All subjective but not that more expensive so why not.
