Originally Posted By: A_Harman
Is it OK for a low-SAPS oil to have Phosphorous below 600 ppm? This UOA is showing 461 ppm. That puts it below the API minimum Phos content for SN oils. Or does that even matter in the VW spec?
Iron content is pretty high, and it's not trending down very quickly. I recommend shorter OCI's, and an oil with higher zddp that still meets VW 507.
That's the whole point of low-SAPS (sulfated ash, phosphorous and sulfur).
Iron content may be high but it's not terrible for this TDI engine series (40-50ppm after full break-in is pretty normal). I highly doubt there's an oil out there with higher ZDDP that meets VW 507. There is the possibility of finding a VW507 oil that has a higher HT/HS rating.
Is it OK for a low-SAPS oil to have Phosphorous below 600 ppm? This UOA is showing 461 ppm. That puts it below the API minimum Phos content for SN oils. Or does that even matter in the VW spec?
Iron content is pretty high, and it's not trending down very quickly. I recommend shorter OCI's, and an oil with higher zddp that still meets VW 507.
That's the whole point of low-SAPS (sulfated ash, phosphorous and sulfur).
Iron content may be high but it's not terrible for this TDI engine series (40-50ppm after full break-in is pretty normal). I highly doubt there's an oil out there with higher ZDDP that meets VW 507. There is the possibility of finding a VW507 oil that has a higher HT/HS rating.