Appreciate the input, but why not? IIRC, the Castrol bottle says it meets BMW specs. Running better than since I bought my used X5 after 5 months ago.

I do plan on draining as much fluid through the drain plug since its been about 5k miles after the first time I drained it.

Castrol USA - Transmax Import Multi–Vehicle

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e70 - purchased 6/2018
e36 - wouldn't pass smog at 190k 2016
e53 - transmission blew at 225k 2012
e30 - sold as it was a little slow for a DD and burning oil at 220k 2011