Great to see that M1 is working for you. In general, I haven't seen any problems in N/A motors with any M1 products since the temps aren't there to shear it down as quickly. However, there have been some positive reports on the new 0w-30 and 0w-40 even in the turbo applications. Good to see that the oil is heading in the right direction.
I have access to many oils (great performance shop that stocks many different ones nearby), so I'm still going to be staying away from M1, but it's personal bias due to my last motor blowing on M1.