Although not many folks in the south paid attention to this, Rotella 0w40 CJ-4 also had a SN rating. Shell Rotella took this away and the Rotella 0w40 is now CK-4 (and CJ-4) but no longer SN. The API will no longer give out a S rating to any oil with over 800 ppm phosphorus like it used to with some of HDEOs. The first two products are the old jugs. The last two are the new product. Enjoy.
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