if you are under impression thinner oil / lower viscosity provides better lubrication.
you are quite wrong.
it is actually the thicker oils that provide better start up protection, by thicker what is meant is the 'right viscosity" for that engine and environment at a specific mileage
hope it delivers the point
i however see no point in debating this.
whatever you see fit is good enough for you/your car.
End of topic 