Quote:
Originally Posted by ElectroBoy
It seems the API S# designation doesn’t necessarily mean the oil formulation changed, it means that the oil meets the relevant API testing requirements. The Toyota SN oil could be the same formulation as the SN Plus oil.
It will be interesting to see if any SN PLUS test results are posted before they test the SP version.
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83Mule
- Not obsessing, just pointing out how to find actual data for differences between oils when a question like the OP asked is asked. Toyota merely recommends TGMO or
equivalent ILSAC GF-5 0W-20 (except for Puerto Rico).
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ElectroBoy
- Correct, and also vice versa. A post on the BITOG forum from Aug 2020:
"There is a four-digit formulation number (revision number) on the back label of all ExxonMobil oils. By looking at this number, you can tell what the formulation is.
The original TGMO 0W-20 SN had RN5953. It was Group-III-based and looked liked it had a lot of polyol ester (POE) if my FTIR oxidation number was correct. It also used trinuclear moly.
Years later PQIA tested a TGMO 0W-20 SN that had RN6378. It was GTL-based with a very high amount of 787 ppm sulfurless Molyvan 855 moly. It also likely had some POE according to Russian FTIR data, but it was only a few percent if at all. TGMO seems to like to have ester.
The SN PLUS version you posted also has RN6378; therefore, the formulation hasn't changed for the last two years or so. You can see the PQIA VOA of this formulation here. Note that the PQIA version is labeled SN but it is the same RN6378 formulation.
Now, someone needs to find the SP bottle so that we can see if the SP formulation is different."
BITOG == Bob is the oil guy / bobistheoilguy.com
FTIR == Fourier Transform Infrared Spectroscopy (one of many ways to analyze lubricants)
PQIA == Petroleum Quality Institute of America
TGMO == Toyota Genuine Motor Oil
VOA == Virgin Oil Analysis
