Hy eggofire, I doubt your issue has anything to do with an oil soaked clutch disc, that problem does not go away and come back, once a disc is soaked in oil it will need to be replaced. I would check the temparature of your brakes when this happens. I would also check the fuel pump pressure, your fuel cap, and the temparature of the ignition coil (it might be breaking down when it heats up), I hope that helps.
