Mercedes-Benz 229.52 approval has a stringent LSPI test. API SP license is not needed.
I believe VW 504 00 does as well.
Vw504 does not that I've been made aware as it was released in 2004. Same with vw508 that was released over 10 years later. Add to that the old 229.52 (same exact number) also does not. M1 has messed up in the past advertising meeting the 229.52 on oils that are not lspi mitigating. It's bizarre to say the least.
Really it's moot as you can buy 5w30 and 0w30 m1 oils that meet SP and be assured you are getting this benefit.
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