Formula R and Edge 5w-30 are a hydrocracked synthetic oil. They start with a mineral oil and break it down to the desired length so that it has the viscosity that they want. That's also why they are cheaper.

I use Formula R 0w-40 which is a PAO like Mobil 1. More expensive though.

I have an unopened bottle of Formula R 5w-30. Anyone wants to buy it off me? Hehe.