I haven't seen a current UOA for Rotella, but UOAs from years past were good. Road Rage stated Rotella was a robust engine oil more than suitable for the S2000. I haven't looked at the latest specs, but I doubt they have substantially changed the oil.

I'll post a UOA for Amsoil ATM 10W30 in a few thousand miles (probably April), when I change over to Amsoil's Z-Rod ZRT 10W30 - and then I'll post results after that run.
I stocked up on sample kits last week to get current UOAs for my engine (ATM), transmission (Amsoil MTF), and eventually the diff again (Amsoil SG 75W110 - probably August or September).