Congrats on the RSX, they're great cars and I used to have one myself (long story, and it was the Type-S model). Is yours the 5 speed automatic or manual? What color?

I wouldn't use any additives since Honda engines are so damn reliable. IMO, it's all a waste of money. You might want to invest in some synthetic oil after the first change, however. I would use it to protect the high revving engine.

Welcome to HAN :thumbup: