Shane from Thunder racing was discussing the new LS30 from JGR. that too was the suggestion from lake Speed Jr. The JGR oils have more of the additives, and use a different base oil that doesn't break down under high rpm or high temperatures.
Base oils improve as they move from mineral oils to synthetics to olefans. The have different kinetic viscosities and are able to handle temperature in different ways. I'm sure that is the difference between Mobil to Motul and JRG oils.
Thunder racing actually suggested that a run Rotella through the motor to clean up any debris that may have gotten in the motor from the blown head gasket. I haven't seen any evidence, but ran it anyway.