Well I have drove two trips to the Ring , many Track days and done 6000 miles, had temp over 120 Deg 60 odd times and had the gearbox oil changed at the service interval!!
My warranty is still fine!!
They only changed the gearbox oil due to its visual appearance as it changes colour when it goes off, they said if it had not changed colour it may be ok to not be changed.
Are we all forgetting how fast the stock GTR really is!!!!