RKCRLR
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Castrol states their Castrol EDGE Euro 0W-40 A3/B4 is:Late 2025 update. Castrol Edge now carries the MS-12633 and MS-A0921 specs on the label.
"Suitable for use in the following specifications: MB 229.3, Chrysler MS-12633 / MS-A0921"
Castrol® EDGE Euro Car formula | Castrol® USA
Castrol® EDGE® Euro Car is a range of advanced full synthetic motor oils engineered to exceed manufacturer test limits, ensuring the highest level of protection and maximum performance for European cars.www.castrol.com
And their data sheet states:
"Warranted by Castrol to be completely suitable for use in vehicles where the following specifications apply: MB 229.3,
Chrysler MS-12633 / MS-A0921"
https://msdspds.castrol.com/bpglis/...720D19480258B0E005F7BBB/$File/WEPP-D4TD96.pdf
However that doesn't mean the same thing as stating it is certified to MS-A0921. But it is good enough for me since it also meets API SP.