Why?
A High quality Motorcycle oil, Made of real Group IV PAO, should most likely contain more shearstable VII Improves, a extra pack of EP additives for use with the gerbox, and more anti foaming additives meant for use in a high reving engine and the gearbox. Motorcycle oils have a low TBN, meant for short intervalls, but that´s O.K. Some contain less calcium, wich results in lowerd desposits, if i have understand it right. The add pack of a motorcycle oil should be custom tailored for a high reving Gasoline engine.
The lack of friction Modifiers? Add a can of Liqui Moly Ceratec, done.
There are even high quality, race proven, Group IV Motorcycle oils out there wich carrys a API SP appooval and have a Mid-saps add pack. If i remember correctly, years ago the VOA of the german FUCHS top of the line Motorcycle oil and the racing oil for cars looked identically, like twins.
I wonder what the experts like Molakule and the guys from HPL have to say about the use of High quality Motorcycle oil in a high reving, demanding sports car and the similarities of Motorcycle oils and car racing oils.