Amsoil experience

I am in agreement with the possibility of an aftermarket filter not having the by pass valve. Seems like the only logical explanation to me, assuming that it was amsoil that was in fact put in the first place...never know, who ever changed that oil might have just been mad at the world that day..just sayin
 
My noise issue was the compensator which I initially thought was engine noise (oil starvation) on start up. Oil needed changing anyway, so no lose. I'll continue to use Amsoil or Mobile 1 in the engine until facts are presented that shows they are harmful to the motor.
 
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