Needed some 16mm hose to hook-up my new oil/air seperator on the 1JZ on the weekend. Couldn't really afford (or find in red, for that matter) pretty silicon hose, so I wne with normal old heater hose. I figured that if it can handle boiling hot water, it would handle a bit of warm air with a very fine oil mist.
But the guy at the local generic auto parts place says NO, I need special oil resistanr hose and that heater hose will disintegrate within a few weeks. \