I the past some xW40 diesel motor oils with Phosphorus levels greater than 800 ppm have still been given a SN rating. This apparently was a compromise given by API when the SN rating came out, limiting Phosphorus to 800 ppm. From what I read, the API have put their foot down and this will no longer be the case. If it has more than 800 ppm Phosphorus, it will not get an SP rating. This is supposedly effective, May 1, 2021.
If I interpreted that incorrectly, chime in. By the way, regarding GF-5, it’s not actually obsolete until May 1, 2021, so sellers are under no obligation to provide GF-6 until then, even though most manufacturers are putting it out now. For instance, Mobil said they plan to have all the GF-6 products labelled as such by the end of this summer.
If I interpreted that incorrectly, chime in. By the way, regarding GF-5, it’s not actually obsolete until May 1, 2021, so sellers are under no obligation to provide GF-6 until then, even though most manufacturers are putting it out now. For instance, Mobil said they plan to have all the GF-6 products labelled as such by the end of this summer.
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