I use Amsoil MC specific in the viscosity called for in the owner's manual. I have zero oil brand loyalty. The only reason I use Amsoil is because it is the cheapest full synthetic MC specific oil I can find where I live and I can have it delivered right to my door by the case. And, no, I don't like their marketing methods. :unsure:
Who has ever heard of an engine failure caused only by using the type of oil specified in the owner's manual that was changed at prescribed intervals or sooner using an OEM filter? I've NEVER heard of this happening on a street application.