Unfortunately, I think Nadal is probably on his way out for exactly the reason you said. His body just won't be able to withstand that ultra physical way he plays.
Just fine. Been running it since 5K and have over 18K miles now. Car is tracked regularly and the extra weight on the hot end (40) helps out alot. Also, mobil 1 0w40 is their only true synthetic oil, (ie. from group IV base stocks) vs cracked group III stocks like their 5-30 "synthetic". It's oem fill for viper, GTR etc and it also has very very favorable blackstone lab results for wear, metals etc compared to most other oils regardless of brand. If you search on this forum, there's actually a few folks who posted oil analysis comparos and mobil 1 0w40, redline 5w30, and GC Castrol 0w-30 were the best 3.