I have used Mobil-1 for the first 80,000KM on my SUV it was 5w30 before they brought out all these new types... Then I moved over to Amsoil SSO, then ASL 5w30/10w30 and all had much lower metal counts in the UOA's than Mobil-1
Both were tried with 5,000 & 10,000KM runs and the UOA's were done after each type of oil had been in there for a minimum of 4 changes...
(AGAIN I KNOW UOA's DON'T MEAN EVERYTHING - For those who are ready to shoot me).