Why does it seems like that everybody wants a save feature for ENDURANCE races? Doesn't the save feature just beat the purpose of the meaning of the word? Yes, there is a possibility that you will get YLOD and possibly won't finish 24h by yourself, but isn't in real life you get to do it with 2-3 other people anyway? Do that and you'll be good. Take the risk if you really want the trophy.
If you get payed for playing GT5 and can buy a new PS3 whenever you want -> congratulations to you and your fantastic life.
I don´t play a game with the risk to damage my console.
And if you mention real life endurance, you should know, that every driver races stints of 2 hours and then have a break...think about it.