I gave you a smart ass answer but it was for a reason. Many people believe they need thicker oil. Why? Because someone else said so? I'm somewhat opinionated when it comes to blindly switching things like oil viscosity.
IMO you can get away with 5w-30 with the 3v clearances but why do it? The motor is designed around 5w-20. One thing in common with spun bearings and stock mod motors is that the owners used thick oil. It doesn't happen right away but a thicker oil will not flow through the bearing clearances in the same volume or pressure as 5w-20. This reduces cooling and the oil wedge that provides positive separation between the bearings and components. The oil has to go through the bottom end and still have enough volume and pressure to make it to the top end. In the top end it has to pressurize the lash adjusters, maintain a wedge for the cams, and make it to the phasers.
I'm sure that many people will tell you to run delo 15w-40 or some crazy thing like that but that doesn't mean it's a good idea.
It's a pet peeve of mine. Ford makes a fantastic product with machinery that can hold tight tolerances and some people want to treat it like it's a small block chevy 350 from 1976. All in the name of protecting the motor because of the "stupid" Ford engineers.
I decided some time ago that I don't have the knowledge, education, or experience to reengineer the fluid dynamics of the lubrication system for the mod motor. If something were failing then maybe I'd give it a try. As is the mod motors are capable of handling large amounts of power in stock form. The breaking point is usually the rods, not the lubrication system.