I bought the car with 30-35k miles. The previous 4 owners (all friends waiting for their F cars and needed something to get used to driving with a rear mid-engine) did the standard oil service at the Acura dealer.
When I got the car in 2007 I immediately switched to Redline. Then after 10k miles my next oil change was due and then I went with when Pennzoil Platinum (after discovering about it) all the way up to about 80k miles and then Ultra came out in 2010 then I did the switch respectively. So there was about 30k miles with Ultra in the engine before the engine rebuild project commenced to handle the additional power from the SOS SC.
I'll continue to run Pennzoil Ultra. There may be ever so slightly better Synthetic oils like Amsoil SS 0w30, Neo Oil, but at half, if not more than the costs from Walmart Ultra is the best value.
As a matter of fact since the Ultra came out there has been no wear comparisons between Amsoil's best oil and Ultra.
Just look at the Pennzoil Platinum wear ratings at the time.