The S&A having the Activator+ pearl coverstock can be sanded to 600, 800 or 1000 grit easily and handle surprising amounts of oil. This core being stronger than the Intense Inferno's core should allow the S, if sanded to 600 or 800 and if drilled for a strong-ish reaction to handle TRUE medium-heavy oil at a minimum, for someone with decent (not cranker, but tweener) revs.