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?
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?