[quote=Flamelord]
Basically, far as I understand, he doesn't grant wishes persay. He just alters probability so that what you wish for happens. And then reality kicks in. So presumably, he's at a point where manipulating the probability of success for a life extension isn't possible anymore
[/quote]

But, according to quantum physics, the probability of anything happening is never zero. Sure, it might be as low as 0.000...1%, but that's still not zero. Therefore, it should be possible according to the wording :P (Blame this on me loving Evil Genie/Corrup-A-Wish games)