You can run Motul Sport 5W50 5k. I would though do UOA at 3k. Reason is that Motul, regardless that API is not that stringent, is still SN. That means it is street OK oil and that oxidation is in check.
Take into consideration, that even Motul 300V in recent UOA did not oxidize too much after 5k run in Corvette, but that is not ethanol etc.
My take:
Get Motul Sport 5W50, run 3,000 miles, do UOA but you must do TAN and TBN test to see where oxidation is and how much life is left.
Hope to see you at HPR sometimes in the spring/summer.