My $.02
I used Castrol GTX 20W50 for a LOT of YEARS...
And, as it turned out, probably more of it than I needed.
I switched to a different brand, because of cost,
and found the oil consumption went DOWN.
That ended my use of it, yet again, a LOT of years ago....
But these days, the Zinc content is a bigger problem!
.... and conventional oil.... yet another subject...
YMMV
DW