only one way to find out: UOA
A lot of it depends on your driving profile. Lots of sity driving, limited warmup, oil never gets to temperature... It may not matter if your oil is a 5w-10 or a 5w-50.
AEHAas has done a lot of studies on oil pressure, etc when running 20 weight oils in engines designed and specced for other viscosities. Im not sure if I buy the results for an 'everyday' engine, as he experimented using some pretty specialized stuff, like ferraris. That said, at the end of the day, how much different could the engine design be as far as bearings, tolerances, oil pumps, etc. go?
JMH