I have been using Amsoil for over 20 years and now use it in our X5 and a V8 4Runner. I use the engine oil, diff oil and the transmission fluids. From what I can find out Toyota use Amsoil for their "new" low drag transmission fluids.
I'll never use castrol after they once scammed me!

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2021 X5 xDrive40i
2015 X5 xDrive35i MSport
(Traded) 2013 X5 xDrive35i