If you read the thread I posted at the very beginning, making the claim that "oil is oil" isn't really logical. The research the individual did indicates there is quite a difference between different types of oil.
Most daily driver gas powered cars (the 4Runner included) are not very demanding of the oil that is put in them. Run the Rotella T6 5w40 if you want to.
There are some more demanding and/or specific street legal car applications, where oil choice and viscosity is more important.
Then there are Motorcycle applications, the recommendations for which can vary, depending on the design of the powertrain.
Then there are racing applications where oil choice can be critical.
So saying that oil is oil, depends on the application.