i read a article somewhere that the eneos oil is better than royal purple and it was proven by dyno runs on the same car. and i kno its royal purple and eneos cuz royal purple bottle was purple and eneos bottle has a distinct golden shaped bottle. but i just use valvoline oil cuz its free.
Whatever the Acura Dealership puts in it. Unfortunately, I don't have the space to change my own oil anymore. It's not practical, and it only cost's me $25 from Acura.