View attachment 280510
MB 229.52 can be used in gasoline engines.
That's obvious, given it's listed beside several gasoline engines in the table I posted from Mercedes.
But that wasn't your claim. You stated it could be used where 229.5 was spec'd, but that does not appear to be the case, at least according to the Mercedes 223.2 specification table, so I'm interested in where you heard that or what prompted you to make that statement.
Mobil 1 ESP X4 0W-40 is modern formulation technology compared to other full SAPS oils that have been only tweaked over the past two decades. And no, Mobil 1 ESP X4 0W-40 does not have a MB 229.5 approval, and I don't know why Mobil would seek one since they already make products that have that approval. My point was that this is a superior product.
ESP X4 isn't a full-SAPS oil, it's mid-SAPS. It wouldn't be eligible for 229.5 anyway, because it's based on C3, rather than A3/B4:
And I don't think the Lubrizol chart shows it being superior, unless your concerns are specifically aftertreatment compatibility, and oxidative thickening, which we don't see a whole heck of a lot of.
The approval sequences for both 229.5 and 229.52 have some differences, mostly due to the C3 vs A3/B4 thing. For example, 229.5 requires a heavier load carrying capacity of 150 vs 100 for 229.52, and 60 for aged oil, while there is no requirement for aged oil under 229.52. 229.5 has oxidation capped at 25 A/cm, while 229.52 is 20.
229.52 uses the OM651 and OM642 engine tests, while 229.5 uses M271 and M272 (FE in W204). 229.5 has to pas VW T4 (all tests from VW 502.00) while 229.52 doesn't.