I visit a parts store occasionally that carries Redline on the shelf. Today I looked a little closer at the labels. They had 10w-40 and 20w-50. These oils aren't certified but they carry "Recommended" statements along the lines of "Recommended for API SJ...A3..." something like that, I don't recall exactly. My question derives from this: the 10w-40 recommendation stated "SJ" and the 20W-50 stated "SH". When reading this I had the thought that this oil must have been sitting around for a while, given that the current API spec is SL. Would that be correct? Does Redline oil fresh from the plant today list "SL" as the recommendation for the API spec?