I have not seen anywhere, the need to run 10/60 on an average rs turbo. My choice is made up from information given. I'm not saying that is should never be used, just not for my spec. This is why I said "I wouldn't" iirc 60 is 70% thicker then the 40. Not saying your wrong because I don't know your spec but this is what I'm told...

The link will show you a post by "the oil man" about half way down that will talk all through the fact of thicker oils.

https://passionford.com/forum/showthread.php?t=160524