I run all AMSOil stuff in mine. Engine, transfer case/rear diff, and transmission. The SOLE reason (other than that it is excellent, top-quality stuff, just like Motul and Liqui-Moly) is because it was the only thing that was readily available when my 1500 mile break-in period service was due.
Such a beautiful RSX-type S indeed. Which cams did this setup have?? For sure with a ported RBC i thought 220whp was what it would be making. I agree, with the combination of quality parts and a healthy K series motor with all motor cams they do make around 230-240whp on a dynojet.